message stringlengths 2 433k | message_type stringclasses 2 values | message_id int64 0 1 | conversation_id int64 113 108k | cluster float64 12 12 | __index_level_0__ int64 226 217k |
|---|---|---|---|---|---|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
This is the easy version of the problem. The only difference is that in this version q = 1. You can make hacks only if both versions of the problem are solved.
There is a process that takes place on arrays a and b of length n and length n-1 respectively.
The process is an infinite sequence of operations. Each operation is as follows:
* First, choose a random integer i (1 ≤ i ≤ n-1).
* Then, simultaneously set a_i = min\left(a_i, \frac{a_i+a_{i+1}-b_i}{2}\right) and a_{i+1} = max\left(a_{i+1}, \frac{a_i+a_{i+1}+b_i}{2}\right) without any rounding (so values may become non-integer).
See notes for an example of an operation.
It can be proven that array a converges, i. e. for each i there exists a limit a_i converges to. Let function F(a, b) return the value a_1 converges to after a process on a and b.
You are given array b, but not array a. However, you are given a third array c. Array a is good if it contains only integers and satisfies 0 ≤ a_i ≤ c_i for 1 ≤ i ≤ n.
Your task is to count the number of good arrays a where F(a, b) ≥ x for q values of x. Since the number of arrays can be very large, print it modulo 10^9+7.
Input
The first line contains a single integer n (2 ≤ n ≤ 100).
The second line contains n integers c_1, c_2 …, c_n (0 ≤ c_i ≤ 100).
The third line contains n-1 integers b_1, b_2, …, b_{n-1} (0 ≤ b_i ≤ 100).
The fourth line contains a single integer q (q=1).
The fifth line contains q space separated integers x_1, x_2, …, x_q (-10^5 ≤ x_i ≤ 10^5).
Output
Output q integers, where the i-th integer is the answer to the i-th query, i. e. the number of good arrays a where F(a, b) ≥ x_i modulo 10^9+7.
Example
Input
3
2 3 4
2 1
1
-1
Output
56
Note
The following explanation assumes b = [2, 1] and c=[2, 3, 4] (as in the sample).
Examples of arrays a that are not good:
* a = [3, 2, 3] is not good because a_1 > c_1;
* a = [0, -1, 3] is not good because a_2 < 0.
One possible good array a is [0, 2, 4]. We can show that no operation has any effect on this array, so F(a, b) = a_1 = 0.
Another possible good array a is [0, 1, 4]. In a single operation with i = 1, we set a_1 = min((0+1-2)/(2), 0) and a_2 = max((0+1+2)/(2), 1). So, after a single operation with i = 1, a becomes equal to [-1/2, 3/2, 4]. We can show that no operation has any effect on this array, so F(a, b) = -1/2.
Submitted Solution:
```
def putin():
return map(int, input().split())
def sol():
n = int(input())
C = list(putin())
B = list(putin())
q = int(input())
x = int(input())
min_arr = [x]
min_part_sums = [x]
part_sums = [C[0]]
for i in range(1, n):
part_sums.append(part_sums[-1] + C[i])
for elem in B:
min_arr.append(min_arr[-1] + elem)
min_part_sums.append(min_arr[-1] + min_part_sums[-1])
for i in range(n):
if min_part_sums[i] > part_sums[i]:
return 0
if min_part_sums[0] > C[0]:
return 0
answer = [1] * (part_sums[0] - max(0, min_part_sums[0]) + 1)
for k in range(1, n):
new_answer = [0] * (part_sums[k] - max(0, min_part_sums[k]) + 1)
cnt = 1
window = answer[-1]
new_answer[-1] = window
while cnt <= len(new_answer) - 1:
cnt += 1
if cnt <= len(answer):
window += answer[-cnt]
if C[k] + 1 < cnt:
window -= answer[C[k] + 1 - cnt]
new_answer[-cnt] = window
answer = new_answer.copy()
return sum(answer)
print(sol())
``` | instruction | 0 | 85,971 | 12 | 171,942 |
No | output | 1 | 85,971 | 12 | 171,943 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
This is the easy version of the problem. The only difference is that in this version q = 1. You can make hacks only if both versions of the problem are solved.
There is a process that takes place on arrays a and b of length n and length n-1 respectively.
The process is an infinite sequence of operations. Each operation is as follows:
* First, choose a random integer i (1 ≤ i ≤ n-1).
* Then, simultaneously set a_i = min\left(a_i, \frac{a_i+a_{i+1}-b_i}{2}\right) and a_{i+1} = max\left(a_{i+1}, \frac{a_i+a_{i+1}+b_i}{2}\right) without any rounding (so values may become non-integer).
See notes for an example of an operation.
It can be proven that array a converges, i. e. for each i there exists a limit a_i converges to. Let function F(a, b) return the value a_1 converges to after a process on a and b.
You are given array b, but not array a. However, you are given a third array c. Array a is good if it contains only integers and satisfies 0 ≤ a_i ≤ c_i for 1 ≤ i ≤ n.
Your task is to count the number of good arrays a where F(a, b) ≥ x for q values of x. Since the number of arrays can be very large, print it modulo 10^9+7.
Input
The first line contains a single integer n (2 ≤ n ≤ 100).
The second line contains n integers c_1, c_2 …, c_n (0 ≤ c_i ≤ 100).
The third line contains n-1 integers b_1, b_2, …, b_{n-1} (0 ≤ b_i ≤ 100).
The fourth line contains a single integer q (q=1).
The fifth line contains q space separated integers x_1, x_2, …, x_q (-10^5 ≤ x_i ≤ 10^5).
Output
Output q integers, where the i-th integer is the answer to the i-th query, i. e. the number of good arrays a where F(a, b) ≥ x_i modulo 10^9+7.
Example
Input
3
2 3 4
2 1
1
-1
Output
56
Note
The following explanation assumes b = [2, 1] and c=[2, 3, 4] (as in the sample).
Examples of arrays a that are not good:
* a = [3, 2, 3] is not good because a_1 > c_1;
* a = [0, -1, 3] is not good because a_2 < 0.
One possible good array a is [0, 2, 4]. We can show that no operation has any effect on this array, so F(a, b) = a_1 = 0.
Another possible good array a is [0, 1, 4]. In a single operation with i = 1, we set a_1 = min((0+1-2)/(2), 0) and a_2 = max((0+1+2)/(2), 1). So, after a single operation with i = 1, a becomes equal to [-1/2, 3/2, 4]. We can show that no operation has any effect on this array, so F(a, b) = -1/2.
Submitted Solution:
```
import sys
input = lambda: sys.stdin.readline().rstrip()
N = int(input())
C = [int(a) for a in input().split()]
B = [int(a) for a in input().split()]
Q = int(input())
x = int(input())
dp = [[0] * 20100 for _ in range(N + 1)]
dp[0][0] = 1
ans = 0
s = x
t = s
for i in range(N):
for j in range(20050, t - 1, -1):
if j < 0: break
dp[i+1][j] = dp[i+1][j+1] + dp[i][max(j-C[i], 0)] - dp[i][j+1]
for j in range(min(t - 1, 20050), -1, -1):
dp[i+1][j] = dp[i+1][j+1]
if i < N - 1:
s += B[i]
t += s
print(dp[-1][0])
``` | instruction | 0 | 85,972 | 12 | 171,944 |
No | output | 1 | 85,972 | 12 | 171,945 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
This is the easy version of the problem. The only difference is that in this version q = 1. You can make hacks only if both versions of the problem are solved.
There is a process that takes place on arrays a and b of length n and length n-1 respectively.
The process is an infinite sequence of operations. Each operation is as follows:
* First, choose a random integer i (1 ≤ i ≤ n-1).
* Then, simultaneously set a_i = min\left(a_i, \frac{a_i+a_{i+1}-b_i}{2}\right) and a_{i+1} = max\left(a_{i+1}, \frac{a_i+a_{i+1}+b_i}{2}\right) without any rounding (so values may become non-integer).
See notes for an example of an operation.
It can be proven that array a converges, i. e. for each i there exists a limit a_i converges to. Let function F(a, b) return the value a_1 converges to after a process on a and b.
You are given array b, but not array a. However, you are given a third array c. Array a is good if it contains only integers and satisfies 0 ≤ a_i ≤ c_i for 1 ≤ i ≤ n.
Your task is to count the number of good arrays a where F(a, b) ≥ x for q values of x. Since the number of arrays can be very large, print it modulo 10^9+7.
Input
The first line contains a single integer n (2 ≤ n ≤ 100).
The second line contains n integers c_1, c_2 …, c_n (0 ≤ c_i ≤ 100).
The third line contains n-1 integers b_1, b_2, …, b_{n-1} (0 ≤ b_i ≤ 100).
The fourth line contains a single integer q (q=1).
The fifth line contains q space separated integers x_1, x_2, …, x_q (-10^5 ≤ x_i ≤ 10^5).
Output
Output q integers, where the i-th integer is the answer to the i-th query, i. e. the number of good arrays a where F(a, b) ≥ x_i modulo 10^9+7.
Example
Input
3
2 3 4
2 1
1
-1
Output
56
Note
The following explanation assumes b = [2, 1] and c=[2, 3, 4] (as in the sample).
Examples of arrays a that are not good:
* a = [3, 2, 3] is not good because a_1 > c_1;
* a = [0, -1, 3] is not good because a_2 < 0.
One possible good array a is [0, 2, 4]. We can show that no operation has any effect on this array, so F(a, b) = a_1 = 0.
Another possible good array a is [0, 1, 4]. In a single operation with i = 1, we set a_1 = min((0+1-2)/(2), 0) and a_2 = max((0+1+2)/(2), 1). So, after a single operation with i = 1, a becomes equal to [-1/2, 3/2, 4]. We can show that no operation has any effect on this array, so F(a, b) = -1/2.
Submitted Solution:
```
def putin():
return map(int, input().split())
def sol():
n = int(input())
C = list(putin())
B = list(putin())
q = int(input())
x = int(input())
min_arr = [x]
min_part = [x]
for elem in B:
min_arr.append(min_arr[-1] + elem)
min_part.append(min_arr[-1] + min_part[-1])
if min_part[0] > C[0]:
return 0
answer = {}
for elem in range(max(0, min_part[0]), C[0] + 1):
answer[elem] = 1
print(answer)
for k in range(1, n):
new_answer = {}
for elem in answer:
for j in range(C[k] + 1):
if elem + j >= min_part[k]:
if elem + j in new_answer:
new_answer[elem + j] += answer[elem]
else:
new_answer[elem + j] = answer[elem]
answer = new_answer.copy()
return sum([answer[key] for key in answer])
print(sol())
``` | instruction | 0 | 85,973 | 12 | 171,946 |
No | output | 1 | 85,973 | 12 | 171,947 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Some time ago Mister B detected a strange signal from the space, which he started to study.
After some transformation the signal turned out to be a permutation p of length n or its cyclic shift. For the further investigation Mister B need some basis, that's why he decided to choose cyclic shift of this permutation which has the minimum possible deviation.
Let's define the deviation of a permutation p as <image>.
Find a cyclic shift of permutation p with minimum possible deviation. If there are multiple solutions, print any of them.
Let's denote id k (0 ≤ k < n) of a cyclic shift of permutation p as the number of right shifts needed to reach this shift, for example:
* k = 0: shift p1, p2, ... pn,
* k = 1: shift pn, p1, ... pn - 1,
* ...,
* k = n - 1: shift p2, p3, ... pn, p1.
Input
First line contains single integer n (2 ≤ n ≤ 106) — the length of the permutation.
The second line contains n space-separated integers p1, p2, ..., pn (1 ≤ pi ≤ n) — the elements of the permutation. It is guaranteed that all elements are distinct.
Output
Print two integers: the minimum deviation of cyclic shifts of permutation p and the id of such shift. If there are multiple solutions, print any of them.
Examples
Input
3
1 2 3
Output
0 0
Input
3
2 3 1
Output
0 1
Input
3
3 2 1
Output
2 1
Note
In the first sample test the given permutation p is the identity permutation, that's why its deviation equals to 0, the shift id equals to 0 as well.
In the second sample test the deviation of p equals to 4, the deviation of the 1-st cyclic shift (1, 2, 3) equals to 0, the deviation of the 2-nd cyclic shift (3, 1, 2) equals to 4, the optimal is the 1-st cyclic shift.
In the third sample test the deviation of p equals to 4, the deviation of the 1-st cyclic shift (1, 3, 2) equals to 2, the deviation of the 2-nd cyclic shift (2, 1, 3) also equals to 2, so the optimal are both 1-st and 2-nd cyclic shifts. | instruction | 0 | 86,209 | 12 | 172,418 |
Tags: data structures, implementation, math
Correct Solution:
```
n = int(input())
data = input().split()
#print(str(n) + " " + str(data))
data = list(map(lambda x: int(x), data))
res = 0
ires = 0
neg = 0
when = [0] * n
for i in range(n):
data[i] = i + 1 - data[i]
res += abs(data[i])
if data[i] <= 0:
neg += 1
a = -data[i]
if a < 0:
a = a + n
when[a] += 1
#print(when)
ares = res
#print(str(res) + " " + str(ires) + " " + str(neg))
for i in range(n):
neg -= when[i]
ares -= neg
ares += (n - neg)
x = data[n - i - 1] + i + 1
ares -= x
ares += n - x
#print(str(res) + " " + str(ires) + " " + str(ares) + " " + str(i) + " " + str(neg))
neg += 1
if ares < res:
res = ares
ires = i + 1
print(str(res) + " " + str(ires))
``` | output | 1 | 86,209 | 12 | 172,419 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Some time ago Mister B detected a strange signal from the space, which he started to study.
After some transformation the signal turned out to be a permutation p of length n or its cyclic shift. For the further investigation Mister B need some basis, that's why he decided to choose cyclic shift of this permutation which has the minimum possible deviation.
Let's define the deviation of a permutation p as <image>.
Find a cyclic shift of permutation p with minimum possible deviation. If there are multiple solutions, print any of them.
Let's denote id k (0 ≤ k < n) of a cyclic shift of permutation p as the number of right shifts needed to reach this shift, for example:
* k = 0: shift p1, p2, ... pn,
* k = 1: shift pn, p1, ... pn - 1,
* ...,
* k = n - 1: shift p2, p3, ... pn, p1.
Input
First line contains single integer n (2 ≤ n ≤ 106) — the length of the permutation.
The second line contains n space-separated integers p1, p2, ..., pn (1 ≤ pi ≤ n) — the elements of the permutation. It is guaranteed that all elements are distinct.
Output
Print two integers: the minimum deviation of cyclic shifts of permutation p and the id of such shift. If there are multiple solutions, print any of them.
Examples
Input
3
1 2 3
Output
0 0
Input
3
2 3 1
Output
0 1
Input
3
3 2 1
Output
2 1
Note
In the first sample test the given permutation p is the identity permutation, that's why its deviation equals to 0, the shift id equals to 0 as well.
In the second sample test the deviation of p equals to 4, the deviation of the 1-st cyclic shift (1, 2, 3) equals to 0, the deviation of the 2-nd cyclic shift (3, 1, 2) equals to 4, the optimal is the 1-st cyclic shift.
In the third sample test the deviation of p equals to 4, the deviation of the 1-st cyclic shift (1, 3, 2) equals to 2, the deviation of the 2-nd cyclic shift (2, 1, 3) also equals to 2, so the optimal are both 1-st and 2-nd cyclic shifts. | instruction | 0 | 86,210 | 12 | 172,420 |
Tags: data structures, implementation, math
Correct Solution:
```
from sys import stdin
def main():
n = int(stdin.readline())
a = list(map(int, stdin.readline().split()))
inf = [0] * (n + 1)
curr = 0
d = 0
for i in range(n):
curr += abs(i + 1 - a[i])
if a[i] > i + 1:
d += 1
inf[a[i] - i - 1] += 1
elif a[i] <= i + 1:
d -= 1
if a[i] == i + 1:
inf[0] += 1
else:
inf[a[i] + n - i - 1] += 1
best = curr
num = 0
for i in range(n):
curr -= d
curr -= 1
curr = curr - abs(a[n - i - 1] - n) + abs(a[n - i - 1] - 1)
d += 2
d -= inf[i + 1] * 2
if curr < best:
best = curr
num = i + 1
print(best, num)
main()
``` | output | 1 | 86,210 | 12 | 172,421 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Some time ago Mister B detected a strange signal from the space, which he started to study.
After some transformation the signal turned out to be a permutation p of length n or its cyclic shift. For the further investigation Mister B need some basis, that's why he decided to choose cyclic shift of this permutation which has the minimum possible deviation.
Let's define the deviation of a permutation p as <image>.
Find a cyclic shift of permutation p with minimum possible deviation. If there are multiple solutions, print any of them.
Let's denote id k (0 ≤ k < n) of a cyclic shift of permutation p as the number of right shifts needed to reach this shift, for example:
* k = 0: shift p1, p2, ... pn,
* k = 1: shift pn, p1, ... pn - 1,
* ...,
* k = n - 1: shift p2, p3, ... pn, p1.
Input
First line contains single integer n (2 ≤ n ≤ 106) — the length of the permutation.
The second line contains n space-separated integers p1, p2, ..., pn (1 ≤ pi ≤ n) — the elements of the permutation. It is guaranteed that all elements are distinct.
Output
Print two integers: the minimum deviation of cyclic shifts of permutation p and the id of such shift. If there are multiple solutions, print any of them.
Examples
Input
3
1 2 3
Output
0 0
Input
3
2 3 1
Output
0 1
Input
3
3 2 1
Output
2 1
Note
In the first sample test the given permutation p is the identity permutation, that's why its deviation equals to 0, the shift id equals to 0 as well.
In the second sample test the deviation of p equals to 4, the deviation of the 1-st cyclic shift (1, 2, 3) equals to 0, the deviation of the 2-nd cyclic shift (3, 1, 2) equals to 4, the optimal is the 1-st cyclic shift.
In the third sample test the deviation of p equals to 4, the deviation of the 1-st cyclic shift (1, 3, 2) equals to 2, the deviation of the 2-nd cyclic shift (2, 1, 3) also equals to 2, so the optimal are both 1-st and 2-nd cyclic shifts. | instruction | 0 | 86,211 | 12 | 172,422 |
Tags: data structures, implementation, math
Correct Solution:
```
def main():
n = int(input())
data = input().split()
#print(str(n) + " " + str(data))
data = list(map(lambda x: int(x), data))
res = 0
ires = 0
neg = 0
when = [0] * n
for i in range(n):
data[i] = i + 1 - data[i]
res += abs(data[i])
if data[i] <= 0:
neg += 1
a = -data[i]
if a < 0:
a = a + n
when[a] += 1
#print(when)
ares = res
#print(str(res) + " " + str(ires) + " " + str(neg))
for i in range(n):
neg -= when[i]
ares -= neg
ares += (n - neg)
x = data[n - i - 1] + i + 1
ares -= x
ares += n - x
#print(str(res) + " " + str(ires) + " " + str(ares) + " " + str(i) + " " + str(neg))
neg += 1
if ares < res:
res = ares
ires = i + 1
print(str(res) + " " + str(ires))
main()
``` | output | 1 | 86,211 | 12 | 172,423 |
Provide a correct Python 3 solution for this coding contest problem.
Sorting algorithms for sorting data are basic algorithms indispensable in computer science. For example, as shown in the figure below, the operation of "sorting the elements of an array of integer values in ascending order" is alignment.
<image>
Many alignment algorithms have been devised, but one of the basic algorithms is bubble sort. As an example, let's arrange an array of given integer values in ascending order by bubble sort.
<image>
In bubble sort, each calculation step divides the array into "sorted parts" and "unsorted parts". Initially, the entire array will be the unsorted part.
From the beginning of the unsorted part, compare the adjacent elements (green element in the figure) and swap them so that the larger value is to the right. If the two values are equal, they will not be exchanged.
<image>
Repeat this process until the end of the unsorted part (white element in the figure). Finally, add the end to the sorted part (blue element in the figure) to complete one step.
Repeat this step until the unsorted part has a length of 1.
<image>
<image>
<image>
When the length of the unsorted part becomes 1, the sorting process ends.
Now, let's create a program that takes an array of n numbers as input, sorts the numbers in ascending order from the beginning of the array by the above bubble sort procedure, and outputs the number of exchanges of the required array elements. Please give me.
Input
A sequence of multiple datasets is given as input. The end of the input is indicated by a single line of zeros. Each dataset is given in the following format:
n
a1
a2
::
an
The first line gives the number n (1 ≤ n ≤ 100), and the following n lines give the i-th number ai (1 ≤ ai ≤ 1000000).
The number of datasets does not exceed 20.
Output
Outputs the number of data element exchanges (integer) for each data set on one line.
Example
Input
5
5
3
2
1
4
6
1
2
3
4
5
6
3
3
2
1
0
Output
7
0
3 | instruction | 0 | 86,465 | 12 | 172,930 |
"Correct Solution:
```
while True:
n = int(input())
if n == 0:
break
L=[]
for _ in range(n):
L.append(int(input()))
cnt = 0
for k in range(1,len(L))[::-1]:
for i in range(k):
if L[i+1] < L[i]:
cnt += 1
L[i+1], L[i] = L[i], L[i+1]
print(cnt)
``` | output | 1 | 86,465 | 12 | 172,931 |
Provide a correct Python 3 solution for this coding contest problem.
Sorting algorithms for sorting data are basic algorithms indispensable in computer science. For example, as shown in the figure below, the operation of "sorting the elements of an array of integer values in ascending order" is alignment.
<image>
Many alignment algorithms have been devised, but one of the basic algorithms is bubble sort. As an example, let's arrange an array of given integer values in ascending order by bubble sort.
<image>
In bubble sort, each calculation step divides the array into "sorted parts" and "unsorted parts". Initially, the entire array will be the unsorted part.
From the beginning of the unsorted part, compare the adjacent elements (green element in the figure) and swap them so that the larger value is to the right. If the two values are equal, they will not be exchanged.
<image>
Repeat this process until the end of the unsorted part (white element in the figure). Finally, add the end to the sorted part (blue element in the figure) to complete one step.
Repeat this step until the unsorted part has a length of 1.
<image>
<image>
<image>
When the length of the unsorted part becomes 1, the sorting process ends.
Now, let's create a program that takes an array of n numbers as input, sorts the numbers in ascending order from the beginning of the array by the above bubble sort procedure, and outputs the number of exchanges of the required array elements. Please give me.
Input
A sequence of multiple datasets is given as input. The end of the input is indicated by a single line of zeros. Each dataset is given in the following format:
n
a1
a2
::
an
The first line gives the number n (1 ≤ n ≤ 100), and the following n lines give the i-th number ai (1 ≤ ai ≤ 1000000).
The number of datasets does not exceed 20.
Output
Outputs the number of data element exchanges (integer) for each data set on one line.
Example
Input
5
5
3
2
1
4
6
1
2
3
4
5
6
3
3
2
1
0
Output
7
0
3 | instruction | 0 | 86,466 | 12 | 172,932 |
"Correct Solution:
```
def b_sort(lst):
limit = len(lst) - 1
cnt = 0
while limit:
for i in range(limit):
if lst[i] > lst[i + 1]:
lst[i], lst[i + 1] = lst[i + 1], lst[i]
cnt += 1
limit -= 1
return cnt
while True:
n = int(input())
if n == 0:
break
alst = []
for _ in range(n):
alst.append(int(input()))
print(b_sort(alst))
``` | output | 1 | 86,466 | 12 | 172,933 |
Provide a correct Python 3 solution for this coding contest problem.
Sorting algorithms for sorting data are basic algorithms indispensable in computer science. For example, as shown in the figure below, the operation of "sorting the elements of an array of integer values in ascending order" is alignment.
<image>
Many alignment algorithms have been devised, but one of the basic algorithms is bubble sort. As an example, let's arrange an array of given integer values in ascending order by bubble sort.
<image>
In bubble sort, each calculation step divides the array into "sorted parts" and "unsorted parts". Initially, the entire array will be the unsorted part.
From the beginning of the unsorted part, compare the adjacent elements (green element in the figure) and swap them so that the larger value is to the right. If the two values are equal, they will not be exchanged.
<image>
Repeat this process until the end of the unsorted part (white element in the figure). Finally, add the end to the sorted part (blue element in the figure) to complete one step.
Repeat this step until the unsorted part has a length of 1.
<image>
<image>
<image>
When the length of the unsorted part becomes 1, the sorting process ends.
Now, let's create a program that takes an array of n numbers as input, sorts the numbers in ascending order from the beginning of the array by the above bubble sort procedure, and outputs the number of exchanges of the required array elements. Please give me.
Input
A sequence of multiple datasets is given as input. The end of the input is indicated by a single line of zeros. Each dataset is given in the following format:
n
a1
a2
::
an
The first line gives the number n (1 ≤ n ≤ 100), and the following n lines give the i-th number ai (1 ≤ ai ≤ 1000000).
The number of datasets does not exceed 20.
Output
Outputs the number of data element exchanges (integer) for each data set on one line.
Example
Input
5
5
3
2
1
4
6
1
2
3
4
5
6
3
3
2
1
0
Output
7
0
3 | instruction | 0 | 86,467 | 12 | 172,934 |
"Correct Solution:
```
def bs(v):
nc = 0
m = len(v)
while m > 0:
j=0
while j < m-1:
if v[j] > v[j+1]:
x = v[j+1]
v[j+1] = v[j]
v[j] = x
nc += 1
j += 1
m -= 1
return(nc)
while True:
n = int(input())
if n==0:
break
v = []
for _ in range(n):
x = int(input())
v.append(x)
print(bs(v))
``` | output | 1 | 86,467 | 12 | 172,935 |
Provide a correct Python 3 solution for this coding contest problem.
Sorting algorithms for sorting data are basic algorithms indispensable in computer science. For example, as shown in the figure below, the operation of "sorting the elements of an array of integer values in ascending order" is alignment.
<image>
Many alignment algorithms have been devised, but one of the basic algorithms is bubble sort. As an example, let's arrange an array of given integer values in ascending order by bubble sort.
<image>
In bubble sort, each calculation step divides the array into "sorted parts" and "unsorted parts". Initially, the entire array will be the unsorted part.
From the beginning of the unsorted part, compare the adjacent elements (green element in the figure) and swap them so that the larger value is to the right. If the two values are equal, they will not be exchanged.
<image>
Repeat this process until the end of the unsorted part (white element in the figure). Finally, add the end to the sorted part (blue element in the figure) to complete one step.
Repeat this step until the unsorted part has a length of 1.
<image>
<image>
<image>
When the length of the unsorted part becomes 1, the sorting process ends.
Now, let's create a program that takes an array of n numbers as input, sorts the numbers in ascending order from the beginning of the array by the above bubble sort procedure, and outputs the number of exchanges of the required array elements. Please give me.
Input
A sequence of multiple datasets is given as input. The end of the input is indicated by a single line of zeros. Each dataset is given in the following format:
n
a1
a2
::
an
The first line gives the number n (1 ≤ n ≤ 100), and the following n lines give the i-th number ai (1 ≤ ai ≤ 1000000).
The number of datasets does not exceed 20.
Output
Outputs the number of data element exchanges (integer) for each data set on one line.
Example
Input
5
5
3
2
1
4
6
1
2
3
4
5
6
3
3
2
1
0
Output
7
0
3 | instruction | 0 | 86,468 | 12 | 172,936 |
"Correct Solution:
```
def solve(A):
res = 0
right = len(A)
while right != 0:
for left in range(0, right):
if left + 1 < len(A) and A[left] > A[left + 1]:
A[left], A[left + 1] = A[left + 1], A[left]
res += 1
right -= 1
return res
while True:
n = int(input())
if n == 0 : break
A = [int(input()) for i in range(n)]
print(solve(A))
``` | output | 1 | 86,468 | 12 | 172,937 |
Provide a correct Python 3 solution for this coding contest problem.
Sorting algorithms for sorting data are basic algorithms indispensable in computer science. For example, as shown in the figure below, the operation of "sorting the elements of an array of integer values in ascending order" is alignment.
<image>
Many alignment algorithms have been devised, but one of the basic algorithms is bubble sort. As an example, let's arrange an array of given integer values in ascending order by bubble sort.
<image>
In bubble sort, each calculation step divides the array into "sorted parts" and "unsorted parts". Initially, the entire array will be the unsorted part.
From the beginning of the unsorted part, compare the adjacent elements (green element in the figure) and swap them so that the larger value is to the right. If the two values are equal, they will not be exchanged.
<image>
Repeat this process until the end of the unsorted part (white element in the figure). Finally, add the end to the sorted part (blue element in the figure) to complete one step.
Repeat this step until the unsorted part has a length of 1.
<image>
<image>
<image>
When the length of the unsorted part becomes 1, the sorting process ends.
Now, let's create a program that takes an array of n numbers as input, sorts the numbers in ascending order from the beginning of the array by the above bubble sort procedure, and outputs the number of exchanges of the required array elements. Please give me.
Input
A sequence of multiple datasets is given as input. The end of the input is indicated by a single line of zeros. Each dataset is given in the following format:
n
a1
a2
::
an
The first line gives the number n (1 ≤ n ≤ 100), and the following n lines give the i-th number ai (1 ≤ ai ≤ 1000000).
The number of datasets does not exceed 20.
Output
Outputs the number of data element exchanges (integer) for each data set on one line.
Example
Input
5
5
3
2
1
4
6
1
2
3
4
5
6
3
3
2
1
0
Output
7
0
3 | instruction | 0 | 86,469 | 12 | 172,938 |
"Correct Solution:
```
while True:
n = int(input())
if n == 0:
break
Num_lis = []
cou = 0
for i in range(n):
Num_lis.append(int(input()))
S_lis = sorted(Num_lis)
while Num_lis != S_lis:
for j in range(n - 1):
if Num_lis[j] > Num_lis[j + 1]:
Num_lis[j],Num_lis[j + 1] = Num_lis[j + 1],Num_lis[j]
cou += 1
print(cou)
``` | output | 1 | 86,469 | 12 | 172,939 |
Provide a correct Python 3 solution for this coding contest problem.
Sorting algorithms for sorting data are basic algorithms indispensable in computer science. For example, as shown in the figure below, the operation of "sorting the elements of an array of integer values in ascending order" is alignment.
<image>
Many alignment algorithms have been devised, but one of the basic algorithms is bubble sort. As an example, let's arrange an array of given integer values in ascending order by bubble sort.
<image>
In bubble sort, each calculation step divides the array into "sorted parts" and "unsorted parts". Initially, the entire array will be the unsorted part.
From the beginning of the unsorted part, compare the adjacent elements (green element in the figure) and swap them so that the larger value is to the right. If the two values are equal, they will not be exchanged.
<image>
Repeat this process until the end of the unsorted part (white element in the figure). Finally, add the end to the sorted part (blue element in the figure) to complete one step.
Repeat this step until the unsorted part has a length of 1.
<image>
<image>
<image>
When the length of the unsorted part becomes 1, the sorting process ends.
Now, let's create a program that takes an array of n numbers as input, sorts the numbers in ascending order from the beginning of the array by the above bubble sort procedure, and outputs the number of exchanges of the required array elements. Please give me.
Input
A sequence of multiple datasets is given as input. The end of the input is indicated by a single line of zeros. Each dataset is given in the following format:
n
a1
a2
::
an
The first line gives the number n (1 ≤ n ≤ 100), and the following n lines give the i-th number ai (1 ≤ ai ≤ 1000000).
The number of datasets does not exceed 20.
Output
Outputs the number of data element exchanges (integer) for each data set on one line.
Example
Input
5
5
3
2
1
4
6
1
2
3
4
5
6
3
3
2
1
0
Output
7
0
3 | instruction | 0 | 86,470 | 12 | 172,940 |
"Correct Solution:
```
# coding: utf-8
import math
import fractions
import heapq
import collections
import re
import array
import bisect
from collections import Counter, defaultdict
class BIT(object):
"""Bibary Indexed Tree / Fenwick Tree"""
# 1-indexed
def __init__(self, size):
self.size = size
self.l = [0] * (size + 1)
def sum(self, i):
r = 0
while i > 0:
r += self.l[i]
i -= i & -i
return r
def add(self, i, x):
while i <= self.size:
self.l[i] += x
i += i & -i
max_a = 1000000
def solve(a):
bit = BIT(max_a)
ans = 0
for i, x in enumerate(a):
ans += i - bit.sum(x)
bit.add(x, 1)
return ans
def main():
while True:
N = int(input())
if N == 0:
return
a = []
for i in range(N):
a.append(int(input()))
print(solve(a))
if __name__ == "__main__":
main()
``` | output | 1 | 86,470 | 12 | 172,941 |
Provide a correct Python 3 solution for this coding contest problem.
Sorting algorithms for sorting data are basic algorithms indispensable in computer science. For example, as shown in the figure below, the operation of "sorting the elements of an array of integer values in ascending order" is alignment.
<image>
Many alignment algorithms have been devised, but one of the basic algorithms is bubble sort. As an example, let's arrange an array of given integer values in ascending order by bubble sort.
<image>
In bubble sort, each calculation step divides the array into "sorted parts" and "unsorted parts". Initially, the entire array will be the unsorted part.
From the beginning of the unsorted part, compare the adjacent elements (green element in the figure) and swap them so that the larger value is to the right. If the two values are equal, they will not be exchanged.
<image>
Repeat this process until the end of the unsorted part (white element in the figure). Finally, add the end to the sorted part (blue element in the figure) to complete one step.
Repeat this step until the unsorted part has a length of 1.
<image>
<image>
<image>
When the length of the unsorted part becomes 1, the sorting process ends.
Now, let's create a program that takes an array of n numbers as input, sorts the numbers in ascending order from the beginning of the array by the above bubble sort procedure, and outputs the number of exchanges of the required array elements. Please give me.
Input
A sequence of multiple datasets is given as input. The end of the input is indicated by a single line of zeros. Each dataset is given in the following format:
n
a1
a2
::
an
The first line gives the number n (1 ≤ n ≤ 100), and the following n lines give the i-th number ai (1 ≤ ai ≤ 1000000).
The number of datasets does not exceed 20.
Output
Outputs the number of data element exchanges (integer) for each data set on one line.
Example
Input
5
5
3
2
1
4
6
1
2
3
4
5
6
3
3
2
1
0
Output
7
0
3 | instruction | 0 | 86,471 | 12 | 172,942 |
"Correct Solution:
```
def bubble_sort(n):
arr = [int(input()) for _ in range(n)]
cnt = 0
for i in range(n):
for j in range(n-1, i, -1):
if arr[j] < arr[j-1]:
arr[j], arr[j-1] = arr[j-1], arr[j]
cnt += 1
return cnt
while True:
n = int(input())
if n == 0: break
print(bubble_sort(n))
``` | output | 1 | 86,471 | 12 | 172,943 |
Provide a correct Python 3 solution for this coding contest problem.
Sorting algorithms for sorting data are basic algorithms indispensable in computer science. For example, as shown in the figure below, the operation of "sorting the elements of an array of integer values in ascending order" is alignment.
<image>
Many alignment algorithms have been devised, but one of the basic algorithms is bubble sort. As an example, let's arrange an array of given integer values in ascending order by bubble sort.
<image>
In bubble sort, each calculation step divides the array into "sorted parts" and "unsorted parts". Initially, the entire array will be the unsorted part.
From the beginning of the unsorted part, compare the adjacent elements (green element in the figure) and swap them so that the larger value is to the right. If the two values are equal, they will not be exchanged.
<image>
Repeat this process until the end of the unsorted part (white element in the figure). Finally, add the end to the sorted part (blue element in the figure) to complete one step.
Repeat this step until the unsorted part has a length of 1.
<image>
<image>
<image>
When the length of the unsorted part becomes 1, the sorting process ends.
Now, let's create a program that takes an array of n numbers as input, sorts the numbers in ascending order from the beginning of the array by the above bubble sort procedure, and outputs the number of exchanges of the required array elements. Please give me.
Input
A sequence of multiple datasets is given as input. The end of the input is indicated by a single line of zeros. Each dataset is given in the following format:
n
a1
a2
::
an
The first line gives the number n (1 ≤ n ≤ 100), and the following n lines give the i-th number ai (1 ≤ ai ≤ 1000000).
The number of datasets does not exceed 20.
Output
Outputs the number of data element exchanges (integer) for each data set on one line.
Example
Input
5
5
3
2
1
4
6
1
2
3
4
5
6
3
3
2
1
0
Output
7
0
3 | instruction | 0 | 86,472 | 12 | 172,944 |
"Correct Solution:
```
def bubbleSort(list):
j = len(list) - 1
bcnt = 0
while j:
for i in range(j):
if list[i] > list[i + 1]:
list[i], list[i + 1] = list[i + 1], list[i]
bcnt += 1
j -= 1
return bcnt
while True:
n = int(input())
if n == 0:
break
A = []
for _ in range(n):
A.append(int(input()))
print(bubbleSort(A))
``` | output | 1 | 86,472 | 12 | 172,945 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Sorting algorithms for sorting data are basic algorithms indispensable in computer science. For example, as shown in the figure below, the operation of "sorting the elements of an array of integer values in ascending order" is alignment.
<image>
Many alignment algorithms have been devised, but one of the basic algorithms is bubble sort. As an example, let's arrange an array of given integer values in ascending order by bubble sort.
<image>
In bubble sort, each calculation step divides the array into "sorted parts" and "unsorted parts". Initially, the entire array will be the unsorted part.
From the beginning of the unsorted part, compare the adjacent elements (green element in the figure) and swap them so that the larger value is to the right. If the two values are equal, they will not be exchanged.
<image>
Repeat this process until the end of the unsorted part (white element in the figure). Finally, add the end to the sorted part (blue element in the figure) to complete one step.
Repeat this step until the unsorted part has a length of 1.
<image>
<image>
<image>
When the length of the unsorted part becomes 1, the sorting process ends.
Now, let's create a program that takes an array of n numbers as input, sorts the numbers in ascending order from the beginning of the array by the above bubble sort procedure, and outputs the number of exchanges of the required array elements. Please give me.
Input
A sequence of multiple datasets is given as input. The end of the input is indicated by a single line of zeros. Each dataset is given in the following format:
n
a1
a2
::
an
The first line gives the number n (1 ≤ n ≤ 100), and the following n lines give the i-th number ai (1 ≤ ai ≤ 1000000).
The number of datasets does not exceed 20.
Output
Outputs the number of data element exchanges (integer) for each data set on one line.
Example
Input
5
5
3
2
1
4
6
1
2
3
4
5
6
3
3
2
1
0
Output
7
0
3
Submitted Solution:
```
# AOJ 0167 Bubble Sort
# Python3 2018.6.20 bal4u
while True:
n = int(input())
if n == 0: break
a = [0]*105
for i in range(n): a[i] = int(input())
cnt = 0
for i in range(n-1, 0, -1):
for j in range(i):
if a[j] > a[j+1]:
cnt += 1
a[j], a[j+1] = a[j+1], a[j]
print(cnt)
``` | instruction | 0 | 86,473 | 12 | 172,946 |
Yes | output | 1 | 86,473 | 12 | 172,947 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Sorting algorithms for sorting data are basic algorithms indispensable in computer science. For example, as shown in the figure below, the operation of "sorting the elements of an array of integer values in ascending order" is alignment.
<image>
Many alignment algorithms have been devised, but one of the basic algorithms is bubble sort. As an example, let's arrange an array of given integer values in ascending order by bubble sort.
<image>
In bubble sort, each calculation step divides the array into "sorted parts" and "unsorted parts". Initially, the entire array will be the unsorted part.
From the beginning of the unsorted part, compare the adjacent elements (green element in the figure) and swap them so that the larger value is to the right. If the two values are equal, they will not be exchanged.
<image>
Repeat this process until the end of the unsorted part (white element in the figure). Finally, add the end to the sorted part (blue element in the figure) to complete one step.
Repeat this step until the unsorted part has a length of 1.
<image>
<image>
<image>
When the length of the unsorted part becomes 1, the sorting process ends.
Now, let's create a program that takes an array of n numbers as input, sorts the numbers in ascending order from the beginning of the array by the above bubble sort procedure, and outputs the number of exchanges of the required array elements. Please give me.
Input
A sequence of multiple datasets is given as input. The end of the input is indicated by a single line of zeros. Each dataset is given in the following format:
n
a1
a2
::
an
The first line gives the number n (1 ≤ n ≤ 100), and the following n lines give the i-th number ai (1 ≤ ai ≤ 1000000).
The number of datasets does not exceed 20.
Output
Outputs the number of data element exchanges (integer) for each data set on one line.
Example
Input
5
5
3
2
1
4
6
1
2
3
4
5
6
3
3
2
1
0
Output
7
0
3
Submitted Solution:
```
while True:
n = int(input())
if n==0: break
a = [int(input()) for _ in range(n)]
count = 0
for i in range(n):
for j in range(n)[:0:-1]:
if a[j] < a[j-1]:
a[j], a[j-1] = a[j-1], a[j]
count+=1
print(count)
``` | instruction | 0 | 86,474 | 12 | 172,948 |
Yes | output | 1 | 86,474 | 12 | 172,949 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Sorting algorithms for sorting data are basic algorithms indispensable in computer science. For example, as shown in the figure below, the operation of "sorting the elements of an array of integer values in ascending order" is alignment.
<image>
Many alignment algorithms have been devised, but one of the basic algorithms is bubble sort. As an example, let's arrange an array of given integer values in ascending order by bubble sort.
<image>
In bubble sort, each calculation step divides the array into "sorted parts" and "unsorted parts". Initially, the entire array will be the unsorted part.
From the beginning of the unsorted part, compare the adjacent elements (green element in the figure) and swap them so that the larger value is to the right. If the two values are equal, they will not be exchanged.
<image>
Repeat this process until the end of the unsorted part (white element in the figure). Finally, add the end to the sorted part (blue element in the figure) to complete one step.
Repeat this step until the unsorted part has a length of 1.
<image>
<image>
<image>
When the length of the unsorted part becomes 1, the sorting process ends.
Now, let's create a program that takes an array of n numbers as input, sorts the numbers in ascending order from the beginning of the array by the above bubble sort procedure, and outputs the number of exchanges of the required array elements. Please give me.
Input
A sequence of multiple datasets is given as input. The end of the input is indicated by a single line of zeros. Each dataset is given in the following format:
n
a1
a2
::
an
The first line gives the number n (1 ≤ n ≤ 100), and the following n lines give the i-th number ai (1 ≤ ai ≤ 1000000).
The number of datasets does not exceed 20.
Output
Outputs the number of data element exchanges (integer) for each data set on one line.
Example
Input
5
5
3
2
1
4
6
1
2
3
4
5
6
3
3
2
1
0
Output
7
0
3
Submitted Solution:
```
# Aizu Problem 00167: Bubble Sort
#
import sys, math, os, bisect
# read input:
PYDEV = os.environ.get('PYDEV')
if PYDEV=="True":
sys.stdin = open("sample-input.txt", "rt")
def bubble_sort(N, A):
cnt = 0
last = N - 1
while last > 0:
for k in range(last):
if A[k] > A[k+1]:
A[k], A[k+1] = A[k+1], A[k]
cnt += 1
last -= 1
return cnt
while True:
N = int(input())
if N == 0:
break
A = [int(input()) for _ in range(N)]
print(bubble_sort(N, A))
``` | instruction | 0 | 86,475 | 12 | 172,950 |
Yes | output | 1 | 86,475 | 12 | 172,951 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Sorting algorithms for sorting data are basic algorithms indispensable in computer science. For example, as shown in the figure below, the operation of "sorting the elements of an array of integer values in ascending order" is alignment.
<image>
Many alignment algorithms have been devised, but one of the basic algorithms is bubble sort. As an example, let's arrange an array of given integer values in ascending order by bubble sort.
<image>
In bubble sort, each calculation step divides the array into "sorted parts" and "unsorted parts". Initially, the entire array will be the unsorted part.
From the beginning of the unsorted part, compare the adjacent elements (green element in the figure) and swap them so that the larger value is to the right. If the two values are equal, they will not be exchanged.
<image>
Repeat this process until the end of the unsorted part (white element in the figure). Finally, add the end to the sorted part (blue element in the figure) to complete one step.
Repeat this step until the unsorted part has a length of 1.
<image>
<image>
<image>
When the length of the unsorted part becomes 1, the sorting process ends.
Now, let's create a program that takes an array of n numbers as input, sorts the numbers in ascending order from the beginning of the array by the above bubble sort procedure, and outputs the number of exchanges of the required array elements. Please give me.
Input
A sequence of multiple datasets is given as input. The end of the input is indicated by a single line of zeros. Each dataset is given in the following format:
n
a1
a2
::
an
The first line gives the number n (1 ≤ n ≤ 100), and the following n lines give the i-th number ai (1 ≤ ai ≤ 1000000).
The number of datasets does not exceed 20.
Output
Outputs the number of data element exchanges (integer) for each data set on one line.
Example
Input
5
5
3
2
1
4
6
1
2
3
4
5
6
3
3
2
1
0
Output
7
0
3
Submitted Solution:
```
while True:
n =int(input())
A=[]
if n==0:
break
for i in range(n):
num =int(input())
A.append(num)
cnt=0
for i in range(n):
for j in range(n-1, 0, -1):
if A[j]<A[j-1]:
A[j], A[j-1]=A[j-1],A[j]
cnt+=1
print(cnt)
``` | instruction | 0 | 86,476 | 12 | 172,952 |
Yes | output | 1 | 86,476 | 12 | 172,953 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Sorting algorithms for sorting data are basic algorithms indispensable in computer science. For example, as shown in the figure below, the operation of "sorting the elements of an array of integer values in ascending order" is alignment.
<image>
Many alignment algorithms have been devised, but one of the basic algorithms is bubble sort. As an example, let's arrange an array of given integer values in ascending order by bubble sort.
<image>
In bubble sort, each calculation step divides the array into "sorted parts" and "unsorted parts". Initially, the entire array will be the unsorted part.
From the beginning of the unsorted part, compare the adjacent elements (green element in the figure) and swap them so that the larger value is to the right. If the two values are equal, they will not be exchanged.
<image>
Repeat this process until the end of the unsorted part (white element in the figure). Finally, add the end to the sorted part (blue element in the figure) to complete one step.
Repeat this step until the unsorted part has a length of 1.
<image>
<image>
<image>
When the length of the unsorted part becomes 1, the sorting process ends.
Now, let's create a program that takes an array of n numbers as input, sorts the numbers in ascending order from the beginning of the array by the above bubble sort procedure, and outputs the number of exchanges of the required array elements. Please give me.
Input
A sequence of multiple datasets is given as input. The end of the input is indicated by a single line of zeros. Each dataset is given in the following format:
n
a1
a2
::
an
The first line gives the number n (1 ≤ n ≤ 100), and the following n lines give the i-th number ai (1 ≤ ai ≤ 1000000).
The number of datasets does not exceed 20.
Output
Outputs the number of data element exchanges (integer) for each data set on one line.
Example
Input
5
5
3
2
1
4
6
1
2
3
4
5
6
3
3
2
1
0
Output
7
0
3
Submitted Solution:
```
while True:
n = int(input())
if n==0: break
a = [input() for _ in range(n)]
count = 0
for i in range(n):
for j in range(n)[:0:-1]:
if a[j] < a[j-1]:
a[j], a[j-1] = a[j-1], a[j]
count+=1
print(count)
``` | instruction | 0 | 86,477 | 12 | 172,954 |
No | output | 1 | 86,477 | 12 | 172,955 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Sorting algorithms for sorting data are basic algorithms indispensable in computer science. For example, as shown in the figure below, the operation of "sorting the elements of an array of integer values in ascending order" is alignment.
<image>
Many alignment algorithms have been devised, but one of the basic algorithms is bubble sort. As an example, let's arrange an array of given integer values in ascending order by bubble sort.
<image>
In bubble sort, each calculation step divides the array into "sorted parts" and "unsorted parts". Initially, the entire array will be the unsorted part.
From the beginning of the unsorted part, compare the adjacent elements (green element in the figure) and swap them so that the larger value is to the right. If the two values are equal, they will not be exchanged.
<image>
Repeat this process until the end of the unsorted part (white element in the figure). Finally, add the end to the sorted part (blue element in the figure) to complete one step.
Repeat this step until the unsorted part has a length of 1.
<image>
<image>
<image>
When the length of the unsorted part becomes 1, the sorting process ends.
Now, let's create a program that takes an array of n numbers as input, sorts the numbers in ascending order from the beginning of the array by the above bubble sort procedure, and outputs the number of exchanges of the required array elements. Please give me.
Input
A sequence of multiple datasets is given as input. The end of the input is indicated by a single line of zeros. Each dataset is given in the following format:
n
a1
a2
::
an
The first line gives the number n (1 ≤ n ≤ 100), and the following n lines give the i-th number ai (1 ≤ ai ≤ 1000000).
The number of datasets does not exceed 20.
Output
Outputs the number of data element exchanges (integer) for each data set on one line.
Example
Input
5
5
3
2
1
4
6
1
2
3
4
5
6
3
3
2
1
0
Output
7
0
3
Submitted Solution:
```
ans = []
while True:
n = int(input())
if n==0: break
a = [input() for _ in range(n)]
count = 0
for i in range(n):
for j in range(n)[:0:-1]:
if a[j] < a[j-1]:
a[j], a[j-1] = a[j-1], a[j]
count+=1
ans.append(count)
print('\n'.join(map(str, ans)))
``` | instruction | 0 | 86,478 | 12 | 172,956 |
No | output | 1 | 86,478 | 12 | 172,957 |
Provide a correct Python 3 solution for this coding contest problem.
Write a program of the Selection Sort algorithm which sorts a sequence A in ascending order. The algorithm should be based on the following pseudocode:
SelectionSort(A)
1 for i = 0 to A.length-1
2 mini = i
3 for j = i to A.length-1
4 if A[j] < A[mini]
5 mini = j
6 swap A[i] and A[mini]
Note that, indices for array elements are based on 0-origin.
Your program should also print the number of swap operations defined in line 6 of the pseudocode in the case where i ≠ mini.
Constraints
1 ≤ N ≤ 100
Input
The first line of the input includes an integer N, the number of elements in the sequence.
In the second line, N elements of the sequence are given separated by space characters.
Output
The output consists of 2 lines.
In the first line, please print the sorted sequence. Two contiguous elements of the sequence should be separated by a space character.
In the second line, please print the number of swap operations.
Examples
Input
6
5 6 4 2 1 3
Output
1 2 3 4 5 6
4
Input
6
5 2 4 6 1 3
Output
1 2 3 4 5 6
3 | instruction | 0 | 86,545 | 12 | 173,090 |
"Correct Solution:
```
N = int(input())
A = list(map(int, input().split()))
times = 0
for i in range(N):
minj = i
for j in range(i, N):
if A[j] < A[minj]:
minj = j
if minj != i:
A[i], A[minj] = A[minj], A[i]
times += 1
print(" ".join(map(str, A)))
print(times)
``` | output | 1 | 86,545 | 12 | 173,091 |
Provide a correct Python 3 solution for this coding contest problem.
Write a program of the Selection Sort algorithm which sorts a sequence A in ascending order. The algorithm should be based on the following pseudocode:
SelectionSort(A)
1 for i = 0 to A.length-1
2 mini = i
3 for j = i to A.length-1
4 if A[j] < A[mini]
5 mini = j
6 swap A[i] and A[mini]
Note that, indices for array elements are based on 0-origin.
Your program should also print the number of swap operations defined in line 6 of the pseudocode in the case where i ≠ mini.
Constraints
1 ≤ N ≤ 100
Input
The first line of the input includes an integer N, the number of elements in the sequence.
In the second line, N elements of the sequence are given separated by space characters.
Output
The output consists of 2 lines.
In the first line, please print the sorted sequence. Two contiguous elements of the sequence should be separated by a space character.
In the second line, please print the number of swap operations.
Examples
Input
6
5 6 4 2 1 3
Output
1 2 3 4 5 6
4
Input
6
5 2 4 6 1 3
Output
1 2 3 4 5 6
3 | instruction | 0 | 86,546 | 12 | 173,092 |
"Correct Solution:
```
i=input
N=int(i())
A=list(map(int,i().split()))
r=range
c=0
for i in r(N):
m=i
for j in r(i,N):
if A[j] < A[m]:m=j
if i!=m:A[i],A[m]=A[m],A[i];c+=1
print(*A)
print(c)
``` | output | 1 | 86,546 | 12 | 173,093 |
Provide a correct Python 3 solution for this coding contest problem.
Write a program of the Selection Sort algorithm which sorts a sequence A in ascending order. The algorithm should be based on the following pseudocode:
SelectionSort(A)
1 for i = 0 to A.length-1
2 mini = i
3 for j = i to A.length-1
4 if A[j] < A[mini]
5 mini = j
6 swap A[i] and A[mini]
Note that, indices for array elements are based on 0-origin.
Your program should also print the number of swap operations defined in line 6 of the pseudocode in the case where i ≠ mini.
Constraints
1 ≤ N ≤ 100
Input
The first line of the input includes an integer N, the number of elements in the sequence.
In the second line, N elements of the sequence are given separated by space characters.
Output
The output consists of 2 lines.
In the first line, please print the sorted sequence. Two contiguous elements of the sequence should be separated by a space character.
In the second line, please print the number of swap operations.
Examples
Input
6
5 6 4 2 1 3
Output
1 2 3 4 5 6
4
Input
6
5 2 4 6 1 3
Output
1 2 3 4 5 6
3 | instruction | 0 | 86,547 | 12 | 173,094 |
"Correct Solution:
```
N = int(input())
A = [int(x) for x in input().split(" ")]
swap_count=0
for i in range(N):
minj = i
for j in range(i, N):
if A[j] < A[minj]:
minj = j
if i != minj:
A[i], A[minj] = A[minj], A[i]
swap_count += 1
print(*A)
print(swap_count)
``` | output | 1 | 86,547 | 12 | 173,095 |
Provide a correct Python 3 solution for this coding contest problem.
Write a program of the Selection Sort algorithm which sorts a sequence A in ascending order. The algorithm should be based on the following pseudocode:
SelectionSort(A)
1 for i = 0 to A.length-1
2 mini = i
3 for j = i to A.length-1
4 if A[j] < A[mini]
5 mini = j
6 swap A[i] and A[mini]
Note that, indices for array elements are based on 0-origin.
Your program should also print the number of swap operations defined in line 6 of the pseudocode in the case where i ≠ mini.
Constraints
1 ≤ N ≤ 100
Input
The first line of the input includes an integer N, the number of elements in the sequence.
In the second line, N elements of the sequence are given separated by space characters.
Output
The output consists of 2 lines.
In the first line, please print the sorted sequence. Two contiguous elements of the sequence should be separated by a space character.
In the second line, please print the number of swap operations.
Examples
Input
6
5 6 4 2 1 3
Output
1 2 3 4 5 6
4
Input
6
5 2 4 6 1 3
Output
1 2 3 4 5 6
3 | instruction | 0 | 86,548 | 12 | 173,096 |
"Correct Solution:
```
c=0
n=int(input())
l=list(map(int, input().split()))
for i in range(n-1):
m=i
for j in range(i,n):
if l[j] < l[m]:
m=j
if i != m:
t=l[i]
l[i]=l[m]
l[m]=t
c+=1
print(*l)
print(c)
``` | output | 1 | 86,548 | 12 | 173,097 |
Provide a correct Python 3 solution for this coding contest problem.
Write a program of the Selection Sort algorithm which sorts a sequence A in ascending order. The algorithm should be based on the following pseudocode:
SelectionSort(A)
1 for i = 0 to A.length-1
2 mini = i
3 for j = i to A.length-1
4 if A[j] < A[mini]
5 mini = j
6 swap A[i] and A[mini]
Note that, indices for array elements are based on 0-origin.
Your program should also print the number of swap operations defined in line 6 of the pseudocode in the case where i ≠ mini.
Constraints
1 ≤ N ≤ 100
Input
The first line of the input includes an integer N, the number of elements in the sequence.
In the second line, N elements of the sequence are given separated by space characters.
Output
The output consists of 2 lines.
In the first line, please print the sorted sequence. Two contiguous elements of the sequence should be separated by a space character.
In the second line, please print the number of swap operations.
Examples
Input
6
5 6 4 2 1 3
Output
1 2 3 4 5 6
4
Input
6
5 2 4 6 1 3
Output
1 2 3 4 5 6
3 | instruction | 0 | 86,549 | 12 | 173,098 |
"Correct Solution:
```
N = int(input())
A = list(map(int, input().split()))
minv = A[0]
sw = 0
for i in range(N):
minv = min(A[i:])
mini = A[i:].index(minv) + i
if A[i] > minv:
temp = A[i]
A[i] = minv
A[mini] = temp
sw += 1
print(*A)
print(sw)
``` | output | 1 | 86,549 | 12 | 173,099 |
Provide a correct Python 3 solution for this coding contest problem.
Write a program of the Selection Sort algorithm which sorts a sequence A in ascending order. The algorithm should be based on the following pseudocode:
SelectionSort(A)
1 for i = 0 to A.length-1
2 mini = i
3 for j = i to A.length-1
4 if A[j] < A[mini]
5 mini = j
6 swap A[i] and A[mini]
Note that, indices for array elements are based on 0-origin.
Your program should also print the number of swap operations defined in line 6 of the pseudocode in the case where i ≠ mini.
Constraints
1 ≤ N ≤ 100
Input
The first line of the input includes an integer N, the number of elements in the sequence.
In the second line, N elements of the sequence are given separated by space characters.
Output
The output consists of 2 lines.
In the first line, please print the sorted sequence. Two contiguous elements of the sequence should be separated by a space character.
In the second line, please print the number of swap operations.
Examples
Input
6
5 6 4 2 1 3
Output
1 2 3 4 5 6
4
Input
6
5 2 4 6 1 3
Output
1 2 3 4 5 6
3 | instruction | 0 | 86,550 | 12 | 173,100 |
"Correct Solution:
```
n, a, c = int(input()), list(map(int, input().split())), 0
for i in range(n):
minj = i
for j in range(i, n):
if a[j] < a[minj]:
minj = j
if minj != i:
a[i], a[minj], c = a[minj], a[i], c + 1
print(*a)
print(c)
``` | output | 1 | 86,550 | 12 | 173,101 |
Provide a correct Python 3 solution for this coding contest problem.
Write a program of the Selection Sort algorithm which sorts a sequence A in ascending order. The algorithm should be based on the following pseudocode:
SelectionSort(A)
1 for i = 0 to A.length-1
2 mini = i
3 for j = i to A.length-1
4 if A[j] < A[mini]
5 mini = j
6 swap A[i] and A[mini]
Note that, indices for array elements are based on 0-origin.
Your program should also print the number of swap operations defined in line 6 of the pseudocode in the case where i ≠ mini.
Constraints
1 ≤ N ≤ 100
Input
The first line of the input includes an integer N, the number of elements in the sequence.
In the second line, N elements of the sequence are given separated by space characters.
Output
The output consists of 2 lines.
In the first line, please print the sorted sequence. Two contiguous elements of the sequence should be separated by a space character.
In the second line, please print the number of swap operations.
Examples
Input
6
5 6 4 2 1 3
Output
1 2 3 4 5 6
4
Input
6
5 2 4 6 1 3
Output
1 2 3 4 5 6
3 | instruction | 0 | 86,551 | 12 | 173,102 |
"Correct Solution:
```
n = int(input())
a = list(map(int, input().split()))
count = 0
for i in range(n):
mini = i
for j in range(i, n):
if a[j] < a[mini]:
mini = j
if i != mini:
a[i], a[mini] = a[mini], a[i]
count += 1
print(*a)
print(count)
``` | output | 1 | 86,551 | 12 | 173,103 |
Provide a correct Python 3 solution for this coding contest problem.
Write a program of the Selection Sort algorithm which sorts a sequence A in ascending order. The algorithm should be based on the following pseudocode:
SelectionSort(A)
1 for i = 0 to A.length-1
2 mini = i
3 for j = i to A.length-1
4 if A[j] < A[mini]
5 mini = j
6 swap A[i] and A[mini]
Note that, indices for array elements are based on 0-origin.
Your program should also print the number of swap operations defined in line 6 of the pseudocode in the case where i ≠ mini.
Constraints
1 ≤ N ≤ 100
Input
The first line of the input includes an integer N, the number of elements in the sequence.
In the second line, N elements of the sequence are given separated by space characters.
Output
The output consists of 2 lines.
In the first line, please print the sorted sequence. Two contiguous elements of the sequence should be separated by a space character.
In the second line, please print the number of swap operations.
Examples
Input
6
5 6 4 2 1 3
Output
1 2 3 4 5 6
4
Input
6
5 2 4 6 1 3
Output
1 2 3 4 5 6
3 | instruction | 0 | 86,552 | 12 | 173,104 |
"Correct Solution:
```
n = int(input())
a = [int(i) for i in input().split()]
cnt = 0
for i in range(n):
m = i
for j in range(i + 1, n):
if a[j] < a[m]:
m = j
if not m == i:
a[m], a[i] = a[i], a[m]
cnt += 1
print(' '.join(map(str, a)))
print(cnt)
``` | output | 1 | 86,552 | 12 | 173,105 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Write a program of the Selection Sort algorithm which sorts a sequence A in ascending order. The algorithm should be based on the following pseudocode:
SelectionSort(A)
1 for i = 0 to A.length-1
2 mini = i
3 for j = i to A.length-1
4 if A[j] < A[mini]
5 mini = j
6 swap A[i] and A[mini]
Note that, indices for array elements are based on 0-origin.
Your program should also print the number of swap operations defined in line 6 of the pseudocode in the case where i ≠ mini.
Constraints
1 ≤ N ≤ 100
Input
The first line of the input includes an integer N, the number of elements in the sequence.
In the second line, N elements of the sequence are given separated by space characters.
Output
The output consists of 2 lines.
In the first line, please print the sorted sequence. Two contiguous elements of the sequence should be separated by a space character.
In the second line, please print the number of swap operations.
Examples
Input
6
5 6 4 2 1 3
Output
1 2 3 4 5 6
4
Input
6
5 2 4 6 1 3
Output
1 2 3 4 5 6
3
Submitted Solution:
```
N=int(input())
A=[int(i) for i in input().split()]
count=0
for i in range(N):
min=i
for j in range(i,N):
if A[j] < A[min]:
min=j
if i<min:
count+=1
A[i],A[min]=A[min],A[i]
for k in range(N):print(A[k],end=' \n'[k+1==N])
print(count)
``` | instruction | 0 | 86,553 | 12 | 173,106 |
Yes | output | 1 | 86,553 | 12 | 173,107 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Write a program of the Selection Sort algorithm which sorts a sequence A in ascending order. The algorithm should be based on the following pseudocode:
SelectionSort(A)
1 for i = 0 to A.length-1
2 mini = i
3 for j = i to A.length-1
4 if A[j] < A[mini]
5 mini = j
6 swap A[i] and A[mini]
Note that, indices for array elements are based on 0-origin.
Your program should also print the number of swap operations defined in line 6 of the pseudocode in the case where i ≠ mini.
Constraints
1 ≤ N ≤ 100
Input
The first line of the input includes an integer N, the number of elements in the sequence.
In the second line, N elements of the sequence are given separated by space characters.
Output
The output consists of 2 lines.
In the first line, please print the sorted sequence. Two contiguous elements of the sequence should be separated by a space character.
In the second line, please print the number of swap operations.
Examples
Input
6
5 6 4 2 1 3
Output
1 2 3 4 5 6
4
Input
6
5 2 4 6 1 3
Output
1 2 3 4 5 6
3
Submitted Solution:
```
N = int(input())
a = list(map(int, input().split()))
count = 0
for i in range(N):
minj = i
for j in range(i, N):
if a[j] < a[minj]:
minj = j
if a[i] != a[minj]:
a[minj], a[i] = a[i], a[minj]
count += 1
print(*a)
print(count)
``` | instruction | 0 | 86,554 | 12 | 173,108 |
Yes | output | 1 | 86,554 | 12 | 173,109 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Write a program of the Selection Sort algorithm which sorts a sequence A in ascending order. The algorithm should be based on the following pseudocode:
SelectionSort(A)
1 for i = 0 to A.length-1
2 mini = i
3 for j = i to A.length-1
4 if A[j] < A[mini]
5 mini = j
6 swap A[i] and A[mini]
Note that, indices for array elements are based on 0-origin.
Your program should also print the number of swap operations defined in line 6 of the pseudocode in the case where i ≠ mini.
Constraints
1 ≤ N ≤ 100
Input
The first line of the input includes an integer N, the number of elements in the sequence.
In the second line, N elements of the sequence are given separated by space characters.
Output
The output consists of 2 lines.
In the first line, please print the sorted sequence. Two contiguous elements of the sequence should be separated by a space character.
In the second line, please print the number of swap operations.
Examples
Input
6
5 6 4 2 1 3
Output
1 2 3 4 5 6
4
Input
6
5 2 4 6 1 3
Output
1 2 3 4 5 6
3
Submitted Solution:
```
n=int(input())
a=list(map(int,input().split()))
c=0
for i in range(n):
m=i
for j in range(i,n):
if a[m]>a[j]:m=j
if i!=m:a[m],a[i]=a[i],a[m];c+=1
print(*a)
print(c)
``` | instruction | 0 | 86,555 | 12 | 173,110 |
Yes | output | 1 | 86,555 | 12 | 173,111 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Write a program of the Selection Sort algorithm which sorts a sequence A in ascending order. The algorithm should be based on the following pseudocode:
SelectionSort(A)
1 for i = 0 to A.length-1
2 mini = i
3 for j = i to A.length-1
4 if A[j] < A[mini]
5 mini = j
6 swap A[i] and A[mini]
Note that, indices for array elements are based on 0-origin.
Your program should also print the number of swap operations defined in line 6 of the pseudocode in the case where i ≠ mini.
Constraints
1 ≤ N ≤ 100
Input
The first line of the input includes an integer N, the number of elements in the sequence.
In the second line, N elements of the sequence are given separated by space characters.
Output
The output consists of 2 lines.
In the first line, please print the sorted sequence. Two contiguous elements of the sequence should be separated by a space character.
In the second line, please print the number of swap operations.
Examples
Input
6
5 6 4 2 1 3
Output
1 2 3 4 5 6
4
Input
6
5 2 4 6 1 3
Output
1 2 3 4 5 6
3
Submitted Solution:
```
N=int(input())
A=list(map(int,input().split()))
count=0
for i in range(N):
minj = i
for j in range(i,N):
if A[j] < A[minj]:
minj=j
if i!=minj:
count+=1
R=A[i]
A[i]=A[minj]
A[minj]=R
Z=[str(a) for a in A]
Z=" ".join(Z)
print(Z)
print(count)
``` | instruction | 0 | 86,556 | 12 | 173,112 |
Yes | output | 1 | 86,556 | 12 | 173,113 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Write a program of the Selection Sort algorithm which sorts a sequence A in ascending order. The algorithm should be based on the following pseudocode:
SelectionSort(A)
1 for i = 0 to A.length-1
2 mini = i
3 for j = i to A.length-1
4 if A[j] < A[mini]
5 mini = j
6 swap A[i] and A[mini]
Note that, indices for array elements are based on 0-origin.
Your program should also print the number of swap operations defined in line 6 of the pseudocode in the case where i ≠ mini.
Constraints
1 ≤ N ≤ 100
Input
The first line of the input includes an integer N, the number of elements in the sequence.
In the second line, N elements of the sequence are given separated by space characters.
Output
The output consists of 2 lines.
In the first line, please print the sorted sequence. Two contiguous elements of the sequence should be separated by a space character.
In the second line, please print the number of swap operations.
Examples
Input
6
5 6 4 2 1 3
Output
1 2 3 4 5 6
4
Input
6
5 2 4 6 1 3
Output
1 2 3 4 5 6
3
Submitted Solution:
```
n = int(input())
a = list(map(int,input()))
c = 0
min = 9
for i in range(0,n):
minj = i
for j in range(i+1,n):
if a[j] < a[minj]:
minj = j
if(i != minj):
a[i],a[minj] = a[minj],a[i]
c += 1
print(*a)
print(c)
``` | instruction | 0 | 86,557 | 12 | 173,114 |
No | output | 1 | 86,557 | 12 | 173,115 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Write a program of the Selection Sort algorithm which sorts a sequence A in ascending order. The algorithm should be based on the following pseudocode:
SelectionSort(A)
1 for i = 0 to A.length-1
2 mini = i
3 for j = i to A.length-1
4 if A[j] < A[mini]
5 mini = j
6 swap A[i] and A[mini]
Note that, indices for array elements are based on 0-origin.
Your program should also print the number of swap operations defined in line 6 of the pseudocode in the case where i ≠ mini.
Constraints
1 ≤ N ≤ 100
Input
The first line of the input includes an integer N, the number of elements in the sequence.
In the second line, N elements of the sequence are given separated by space characters.
Output
The output consists of 2 lines.
In the first line, please print the sorted sequence. Two contiguous elements of the sequence should be separated by a space character.
In the second line, please print the number of swap operations.
Examples
Input
6
5 6 4 2 1 3
Output
1 2 3 4 5 6
4
Input
6
5 2 4 6 1 3
Output
1 2 3 4 5 6
3
Submitted Solution:
```
# -*- coding: utf-8 -*-
N = int(input())
A = list(map(int, input().split()))
count = 0
for i in range(N):
minj = i
for j in range(i, N):
if A[j] < A[minj]:
minj = j
A[i], A[minj] = A[minj], A[i]
count += 1
for i in range(N):
if i == N - 1:
print("{0}".format(A[i]))
else:
print("{0} ".format(A[i]), end="")
print(count)
``` | instruction | 0 | 86,558 | 12 | 173,116 |
No | output | 1 | 86,558 | 12 | 173,117 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Write a program of the Selection Sort algorithm which sorts a sequence A in ascending order. The algorithm should be based on the following pseudocode:
SelectionSort(A)
1 for i = 0 to A.length-1
2 mini = i
3 for j = i to A.length-1
4 if A[j] < A[mini]
5 mini = j
6 swap A[i] and A[mini]
Note that, indices for array elements are based on 0-origin.
Your program should also print the number of swap operations defined in line 6 of the pseudocode in the case where i ≠ mini.
Constraints
1 ≤ N ≤ 100
Input
The first line of the input includes an integer N, the number of elements in the sequence.
In the second line, N elements of the sequence are given separated by space characters.
Output
The output consists of 2 lines.
In the first line, please print the sorted sequence. Two contiguous elements of the sequence should be separated by a space character.
In the second line, please print the number of swap operations.
Examples
Input
6
5 6 4 2 1 3
Output
1 2 3 4 5 6
4
Input
6
5 2 4 6 1 3
Output
1 2 3 4 5 6
3
Submitted Solution:
```
N = int(input())
A = list(map(int, input().split()))
count = 0
for i in range(0, N-1):
minj = i
for j in range(i, N-1):
if (A[j] < A[minj]):
minj = j
A[i], A[minj] = A[minj], A[i]
count += 1
print(*A)
print(count)
``` | instruction | 0 | 86,559 | 12 | 173,118 |
No | output | 1 | 86,559 | 12 | 173,119 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Write a program of the Selection Sort algorithm which sorts a sequence A in ascending order. The algorithm should be based on the following pseudocode:
SelectionSort(A)
1 for i = 0 to A.length-1
2 mini = i
3 for j = i to A.length-1
4 if A[j] < A[mini]
5 mini = j
6 swap A[i] and A[mini]
Note that, indices for array elements are based on 0-origin.
Your program should also print the number of swap operations defined in line 6 of the pseudocode in the case where i ≠ mini.
Constraints
1 ≤ N ≤ 100
Input
The first line of the input includes an integer N, the number of elements in the sequence.
In the second line, N elements of the sequence are given separated by space characters.
Output
The output consists of 2 lines.
In the first line, please print the sorted sequence. Two contiguous elements of the sequence should be separated by a space character.
In the second line, please print the number of swap operations.
Examples
Input
6
5 6 4 2 1 3
Output
1 2 3 4 5 6
4
Input
6
5 2 4 6 1 3
Output
1 2 3 4 5 6
3
Submitted Solution:
```
N = int(input())
A = [int(e) for e in input().split()]
def selection_sort(A, N):
steps = 0
for i in range(0, N):
minj = i
for j in range(i, N):
if A[minj] > A[j]:
minj = j
steps += 1
A[minj], A[i] = A[i], A[minj]
print(A)
print(steps)
return A
selection_sort(A, N)
``` | instruction | 0 | 86,560 | 12 | 173,120 |
No | output | 1 | 86,560 | 12 | 173,121 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Let n be an integer. Consider all permutations on integers 1 to n in lexicographic order, and concatenate them into one big sequence p. For example, if n = 3, then p = [1, 2, 3, 1, 3, 2, 2, 1, 3, 2, 3, 1, 3, 1, 2, 3, 2, 1]. The length of this sequence will be n ⋅ n!.
Let 1 ≤ i ≤ j ≤ n ⋅ n! be a pair of indices. We call the sequence (p_i, p_{i+1}, ..., p_{j-1}, p_j) a subarray of p. Its length is defined as the number of its elements, i.e., j - i + 1. Its sum is the sum of all its elements, i.e., ∑_{k=i}^j p_k.
You are given n. Find the number of subarrays of p of length n having sum (n(n+1))/(2). Since this number may be large, output it modulo 998244353 (a prime number).
Input
The only line contains one integer n (1 ≤ n ≤ 10^6), as described in the problem statement.
Output
Output a single integer — the number of subarrays of length n having sum (n(n+1))/(2), modulo 998244353.
Examples
Input
3
Output
9
Input
4
Output
56
Input
10
Output
30052700
Note
In the first sample, there are 16 subarrays of length 3. In order of appearance, they are:
[1, 2, 3], [2, 3, 1], [3, 1, 3], [1, 3, 2], [3, 2, 2], [2, 2, 1], [2, 1, 3], [1, 3, 2], [3, 2, 3], [2, 3, 1], [3, 1, 3], [1, 3, 1], [3, 1, 2], [1, 2, 3], [2, 3, 2], [3, 2, 1].
Their sums are 6, 6, 7, 6, 7, 5, 6, 6, 8, 6, 7, 5, 6, 6, 7, 6. As (n(n+1))/(2) = 6, the answer is 9. | instruction | 0 | 86,617 | 12 | 173,234 |
Tags: combinatorics, dp, math
Correct Solution:
```
m=998244353
n=int(input())
fact=1
for i in range(2,n+1):
fact*=i
fact%=m
ans=fact
k=1
for i in range(n,1,-1):
k*=i;k%=m
ans+=((fact-k)%m)
ans%=m
print(ans)
``` | output | 1 | 86,617 | 12 | 173,235 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Let n be an integer. Consider all permutations on integers 1 to n in lexicographic order, and concatenate them into one big sequence p. For example, if n = 3, then p = [1, 2, 3, 1, 3, 2, 2, 1, 3, 2, 3, 1, 3, 1, 2, 3, 2, 1]. The length of this sequence will be n ⋅ n!.
Let 1 ≤ i ≤ j ≤ n ⋅ n! be a pair of indices. We call the sequence (p_i, p_{i+1}, ..., p_{j-1}, p_j) a subarray of p. Its length is defined as the number of its elements, i.e., j - i + 1. Its sum is the sum of all its elements, i.e., ∑_{k=i}^j p_k.
You are given n. Find the number of subarrays of p of length n having sum (n(n+1))/(2). Since this number may be large, output it modulo 998244353 (a prime number).
Input
The only line contains one integer n (1 ≤ n ≤ 10^6), as described in the problem statement.
Output
Output a single integer — the number of subarrays of length n having sum (n(n+1))/(2), modulo 998244353.
Examples
Input
3
Output
9
Input
4
Output
56
Input
10
Output
30052700
Note
In the first sample, there are 16 subarrays of length 3. In order of appearance, they are:
[1, 2, 3], [2, 3, 1], [3, 1, 3], [1, 3, 2], [3, 2, 2], [2, 2, 1], [2, 1, 3], [1, 3, 2], [3, 2, 3], [2, 3, 1], [3, 1, 3], [1, 3, 1], [3, 1, 2], [1, 2, 3], [2, 3, 2], [3, 2, 1].
Their sums are 6, 6, 7, 6, 7, 5, 6, 6, 8, 6, 7, 5, 6, 6, 7, 6. As (n(n+1))/(2) = 6, the answer is 9. | instruction | 0 | 86,618 | 12 | 173,236 |
Tags: combinatorics, dp, math
Correct Solution:
```
n = int(input())
def fun(n):
if n==1:
return 1
else:
cur = n
for i in range(1, n):
cur = (cur - 1) * (i+1) % 998244353
return(cur)
print(fun(n))
# t = int(input())
# res = t
# i = 2
# while(i<=t):
# res = (res-1)*i%998244353
# i+=1
# print(res)
``` | output | 1 | 86,618 | 12 | 173,237 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Let n be an integer. Consider all permutations on integers 1 to n in lexicographic order, and concatenate them into one big sequence p. For example, if n = 3, then p = [1, 2, 3, 1, 3, 2, 2, 1, 3, 2, 3, 1, 3, 1, 2, 3, 2, 1]. The length of this sequence will be n ⋅ n!.
Let 1 ≤ i ≤ j ≤ n ⋅ n! be a pair of indices. We call the sequence (p_i, p_{i+1}, ..., p_{j-1}, p_j) a subarray of p. Its length is defined as the number of its elements, i.e., j - i + 1. Its sum is the sum of all its elements, i.e., ∑_{k=i}^j p_k.
You are given n. Find the number of subarrays of p of length n having sum (n(n+1))/(2). Since this number may be large, output it modulo 998244353 (a prime number).
Input
The only line contains one integer n (1 ≤ n ≤ 10^6), as described in the problem statement.
Output
Output a single integer — the number of subarrays of length n having sum (n(n+1))/(2), modulo 998244353.
Examples
Input
3
Output
9
Input
4
Output
56
Input
10
Output
30052700
Note
In the first sample, there are 16 subarrays of length 3. In order of appearance, they are:
[1, 2, 3], [2, 3, 1], [3, 1, 3], [1, 3, 2], [3, 2, 2], [2, 2, 1], [2, 1, 3], [1, 3, 2], [3, 2, 3], [2, 3, 1], [3, 1, 3], [1, 3, 1], [3, 1, 2], [1, 2, 3], [2, 3, 2], [3, 2, 1].
Their sums are 6, 6, 7, 6, 7, 5, 6, 6, 8, 6, 7, 5, 6, 6, 7, 6. As (n(n+1))/(2) = 6, the answer is 9. | instruction | 0 | 86,619 | 12 | 173,238 |
Tags: combinatorics, dp, math
Correct Solution:
```
n = int(input())
prefix = 1
ans = 0
mod = 998244353
for k in range(1, n):
ans += (prefix*(n-k)*k)%mod
prefix *= n-k+1
prefix %= mod
print((ans+1)%mod)
``` | output | 1 | 86,619 | 12 | 173,239 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Let n be an integer. Consider all permutations on integers 1 to n in lexicographic order, and concatenate them into one big sequence p. For example, if n = 3, then p = [1, 2, 3, 1, 3, 2, 2, 1, 3, 2, 3, 1, 3, 1, 2, 3, 2, 1]. The length of this sequence will be n ⋅ n!.
Let 1 ≤ i ≤ j ≤ n ⋅ n! be a pair of indices. We call the sequence (p_i, p_{i+1}, ..., p_{j-1}, p_j) a subarray of p. Its length is defined as the number of its elements, i.e., j - i + 1. Its sum is the sum of all its elements, i.e., ∑_{k=i}^j p_k.
You are given n. Find the number of subarrays of p of length n having sum (n(n+1))/(2). Since this number may be large, output it modulo 998244353 (a prime number).
Input
The only line contains one integer n (1 ≤ n ≤ 10^6), as described in the problem statement.
Output
Output a single integer — the number of subarrays of length n having sum (n(n+1))/(2), modulo 998244353.
Examples
Input
3
Output
9
Input
4
Output
56
Input
10
Output
30052700
Note
In the first sample, there are 16 subarrays of length 3. In order of appearance, they are:
[1, 2, 3], [2, 3, 1], [3, 1, 3], [1, 3, 2], [3, 2, 2], [2, 2, 1], [2, 1, 3], [1, 3, 2], [3, 2, 3], [2, 3, 1], [3, 1, 3], [1, 3, 1], [3, 1, 2], [1, 2, 3], [2, 3, 2], [3, 2, 1].
Their sums are 6, 6, 7, 6, 7, 5, 6, 6, 8, 6, 7, 5, 6, 6, 7, 6. As (n(n+1))/(2) = 6, the answer is 9. | instruction | 0 | 86,620 | 12 | 173,240 |
Tags: combinatorics, dp, math
Correct Solution:
```
n = int(input())
f_n = n
cnt = 0
for k in range(n-1, 0, -1):
cnt += f_n
f_n *= k
if f_n >= 998244353:
f_n %= 998244353
print((n*f_n-cnt)%998244353)
``` | output | 1 | 86,620 | 12 | 173,241 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Let n be an integer. Consider all permutations on integers 1 to n in lexicographic order, and concatenate them into one big sequence p. For example, if n = 3, then p = [1, 2, 3, 1, 3, 2, 2, 1, 3, 2, 3, 1, 3, 1, 2, 3, 2, 1]. The length of this sequence will be n ⋅ n!.
Let 1 ≤ i ≤ j ≤ n ⋅ n! be a pair of indices. We call the sequence (p_i, p_{i+1}, ..., p_{j-1}, p_j) a subarray of p. Its length is defined as the number of its elements, i.e., j - i + 1. Its sum is the sum of all its elements, i.e., ∑_{k=i}^j p_k.
You are given n. Find the number of subarrays of p of length n having sum (n(n+1))/(2). Since this number may be large, output it modulo 998244353 (a prime number).
Input
The only line contains one integer n (1 ≤ n ≤ 10^6), as described in the problem statement.
Output
Output a single integer — the number of subarrays of length n having sum (n(n+1))/(2), modulo 998244353.
Examples
Input
3
Output
9
Input
4
Output
56
Input
10
Output
30052700
Note
In the first sample, there are 16 subarrays of length 3. In order of appearance, they are:
[1, 2, 3], [2, 3, 1], [3, 1, 3], [1, 3, 2], [3, 2, 2], [2, 2, 1], [2, 1, 3], [1, 3, 2], [3, 2, 3], [2, 3, 1], [3, 1, 3], [1, 3, 1], [3, 1, 2], [1, 2, 3], [2, 3, 2], [3, 2, 1].
Their sums are 6, 6, 7, 6, 7, 5, 6, 6, 8, 6, 7, 5, 6, 6, 7, 6. As (n(n+1))/(2) = 6, the answer is 9. | instruction | 0 | 86,621 | 12 | 173,242 |
Tags: combinatorics, dp, math
Correct Solution:
```
n = int(input())
mod = 998244353
rev = []
cur = 1
s = 0
for i in range(n, 0, -1):
cur *= i
tmp = cur - s
s += tmp
s %= mod
cur %= mod
rev.append(tmp % mod)
# print(rev)
ans = 1
for i in range(1, n + 1):
ans *= i
ans %= mod
for i in range(1, n - 1):
ans += i * rev[i]
ans %= mod
print(ans)
``` | output | 1 | 86,621 | 12 | 173,243 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Let n be an integer. Consider all permutations on integers 1 to n in lexicographic order, and concatenate them into one big sequence p. For example, if n = 3, then p = [1, 2, 3, 1, 3, 2, 2, 1, 3, 2, 3, 1, 3, 1, 2, 3, 2, 1]. The length of this sequence will be n ⋅ n!.
Let 1 ≤ i ≤ j ≤ n ⋅ n! be a pair of indices. We call the sequence (p_i, p_{i+1}, ..., p_{j-1}, p_j) a subarray of p. Its length is defined as the number of its elements, i.e., j - i + 1. Its sum is the sum of all its elements, i.e., ∑_{k=i}^j p_k.
You are given n. Find the number of subarrays of p of length n having sum (n(n+1))/(2). Since this number may be large, output it modulo 998244353 (a prime number).
Input
The only line contains one integer n (1 ≤ n ≤ 10^6), as described in the problem statement.
Output
Output a single integer — the number of subarrays of length n having sum (n(n+1))/(2), modulo 998244353.
Examples
Input
3
Output
9
Input
4
Output
56
Input
10
Output
30052700
Note
In the first sample, there are 16 subarrays of length 3. In order of appearance, they are:
[1, 2, 3], [2, 3, 1], [3, 1, 3], [1, 3, 2], [3, 2, 2], [2, 2, 1], [2, 1, 3], [1, 3, 2], [3, 2, 3], [2, 3, 1], [3, 1, 3], [1, 3, 1], [3, 1, 2], [1, 2, 3], [2, 3, 2], [3, 2, 1].
Their sums are 6, 6, 7, 6, 7, 5, 6, 6, 8, 6, 7, 5, 6, 6, 7, 6. As (n(n+1))/(2) = 6, the answer is 9. | instruction | 0 | 86,622 | 12 | 173,244 |
Tags: combinatorics, dp, math
Correct Solution:
```
n, ans, mod, r = int(input()), 1, 998244353, 0
for i in range(2, n + 1):
ans = ans * i % mod
r = (r + 1) * i % mod
print((((ans * n - r) % mod) + mod) % mod)
``` | output | 1 | 86,622 | 12 | 173,245 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Let n be an integer. Consider all permutations on integers 1 to n in lexicographic order, and concatenate them into one big sequence p. For example, if n = 3, then p = [1, 2, 3, 1, 3, 2, 2, 1, 3, 2, 3, 1, 3, 1, 2, 3, 2, 1]. The length of this sequence will be n ⋅ n!.
Let 1 ≤ i ≤ j ≤ n ⋅ n! be a pair of indices. We call the sequence (p_i, p_{i+1}, ..., p_{j-1}, p_j) a subarray of p. Its length is defined as the number of its elements, i.e., j - i + 1. Its sum is the sum of all its elements, i.e., ∑_{k=i}^j p_k.
You are given n. Find the number of subarrays of p of length n having sum (n(n+1))/(2). Since this number may be large, output it modulo 998244353 (a prime number).
Input
The only line contains one integer n (1 ≤ n ≤ 10^6), as described in the problem statement.
Output
Output a single integer — the number of subarrays of length n having sum (n(n+1))/(2), modulo 998244353.
Examples
Input
3
Output
9
Input
4
Output
56
Input
10
Output
30052700
Note
In the first sample, there are 16 subarrays of length 3. In order of appearance, they are:
[1, 2, 3], [2, 3, 1], [3, 1, 3], [1, 3, 2], [3, 2, 2], [2, 2, 1], [2, 1, 3], [1, 3, 2], [3, 2, 3], [2, 3, 1], [3, 1, 3], [1, 3, 1], [3, 1, 2], [1, 2, 3], [2, 3, 2], [3, 2, 1].
Their sums are 6, 6, 7, 6, 7, 5, 6, 6, 8, 6, 7, 5, 6, 6, 7, 6. As (n(n+1))/(2) = 6, the answer is 9. | instruction | 0 | 86,623 | 12 | 173,246 |
Tags: combinatorics, dp, math
Correct Solution:
```
def solve():
n = int(input())
factorials = [0,1,2,6,24,120]
subtract = [0,0,2,9,40,205]
for item in range(6,n+1):
factorials.append((factorials[-1]*item)%998244353)
subtract.append(((subtract[-1]+1)*item)%998244353)
print (((n*factorials[n])%998244353-subtract[n])%998244353)
solve()
``` | output | 1 | 86,623 | 12 | 173,247 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Let n be an integer. Consider all permutations on integers 1 to n in lexicographic order, and concatenate them into one big sequence p. For example, if n = 3, then p = [1, 2, 3, 1, 3, 2, 2, 1, 3, 2, 3, 1, 3, 1, 2, 3, 2, 1]. The length of this sequence will be n ⋅ n!.
Let 1 ≤ i ≤ j ≤ n ⋅ n! be a pair of indices. We call the sequence (p_i, p_{i+1}, ..., p_{j-1}, p_j) a subarray of p. Its length is defined as the number of its elements, i.e., j - i + 1. Its sum is the sum of all its elements, i.e., ∑_{k=i}^j p_k.
You are given n. Find the number of subarrays of p of length n having sum (n(n+1))/(2). Since this number may be large, output it modulo 998244353 (a prime number).
Input
The only line contains one integer n (1 ≤ n ≤ 10^6), as described in the problem statement.
Output
Output a single integer — the number of subarrays of length n having sum (n(n+1))/(2), modulo 998244353.
Examples
Input
3
Output
9
Input
4
Output
56
Input
10
Output
30052700
Note
In the first sample, there are 16 subarrays of length 3. In order of appearance, they are:
[1, 2, 3], [2, 3, 1], [3, 1, 3], [1, 3, 2], [3, 2, 2], [2, 2, 1], [2, 1, 3], [1, 3, 2], [3, 2, 3], [2, 3, 1], [3, 1, 3], [1, 3, 1], [3, 1, 2], [1, 2, 3], [2, 3, 2], [3, 2, 1].
Their sums are 6, 6, 7, 6, 7, 5, 6, 6, 8, 6, 7, 5, 6, 6, 7, 6. As (n(n+1))/(2) = 6, the answer is 9. | instruction | 0 | 86,624 | 12 | 173,248 |
Tags: combinatorics, dp, math
Correct Solution:
```
n = int(input())
if (n == 1):
print(1)
exit(0)
if (n == 2):
print(2)
exit(0)
a = []
n+=1
a.append(9)
iter = 1
nn=4
m = 6
for i in range(nn , n):
m *= i
m %= 998244353
a.append((a[iter-1]-1)*nn+m)
a[iter] %= 998244353
nn+=1
iter += 1
print(a[iter-1])
``` | output | 1 | 86,624 | 12 | 173,249 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let n be an integer. Consider all permutations on integers 1 to n in lexicographic order, and concatenate them into one big sequence p. For example, if n = 3, then p = [1, 2, 3, 1, 3, 2, 2, 1, 3, 2, 3, 1, 3, 1, 2, 3, 2, 1]. The length of this sequence will be n ⋅ n!.
Let 1 ≤ i ≤ j ≤ n ⋅ n! be a pair of indices. We call the sequence (p_i, p_{i+1}, ..., p_{j-1}, p_j) a subarray of p. Its length is defined as the number of its elements, i.e., j - i + 1. Its sum is the sum of all its elements, i.e., ∑_{k=i}^j p_k.
You are given n. Find the number of subarrays of p of length n having sum (n(n+1))/(2). Since this number may be large, output it modulo 998244353 (a prime number).
Input
The only line contains one integer n (1 ≤ n ≤ 10^6), as described in the problem statement.
Output
Output a single integer — the number of subarrays of length n having sum (n(n+1))/(2), modulo 998244353.
Examples
Input
3
Output
9
Input
4
Output
56
Input
10
Output
30052700
Note
In the first sample, there are 16 subarrays of length 3. In order of appearance, they are:
[1, 2, 3], [2, 3, 1], [3, 1, 3], [1, 3, 2], [3, 2, 2], [2, 2, 1], [2, 1, 3], [1, 3, 2], [3, 2, 3], [2, 3, 1], [3, 1, 3], [1, 3, 1], [3, 1, 2], [1, 2, 3], [2, 3, 2], [3, 2, 1].
Their sums are 6, 6, 7, 6, 7, 5, 6, 6, 8, 6, 7, 5, 6, 6, 7, 6. As (n(n+1))/(2) = 6, the answer is 9.
Submitted Solution:
```
from sys import stdin,stdout
from collections import defaultdict,Counter
from bisect import bisect,bisect_left
import math
from itertools import permutations
#stdin = open('input.txt','r')
I = stdin.readline
mod = 998244353
n = int(I())
b = 0
prod = 1
for i in range(0,n-1):
prod*=(n-i)
prod%=mod
b-=prod
#print(prod,i,b)
#print(a,b)
b+=n*prod
print(int((b)%mod))
``` | instruction | 0 | 86,625 | 12 | 173,250 |
Yes | output | 1 | 86,625 | 12 | 173,251 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let n be an integer. Consider all permutations on integers 1 to n in lexicographic order, and concatenate them into one big sequence p. For example, if n = 3, then p = [1, 2, 3, 1, 3, 2, 2, 1, 3, 2, 3, 1, 3, 1, 2, 3, 2, 1]. The length of this sequence will be n ⋅ n!.
Let 1 ≤ i ≤ j ≤ n ⋅ n! be a pair of indices. We call the sequence (p_i, p_{i+1}, ..., p_{j-1}, p_j) a subarray of p. Its length is defined as the number of its elements, i.e., j - i + 1. Its sum is the sum of all its elements, i.e., ∑_{k=i}^j p_k.
You are given n. Find the number of subarrays of p of length n having sum (n(n+1))/(2). Since this number may be large, output it modulo 998244353 (a prime number).
Input
The only line contains one integer n (1 ≤ n ≤ 10^6), as described in the problem statement.
Output
Output a single integer — the number of subarrays of length n having sum (n(n+1))/(2), modulo 998244353.
Examples
Input
3
Output
9
Input
4
Output
56
Input
10
Output
30052700
Note
In the first sample, there are 16 subarrays of length 3. In order of appearance, they are:
[1, 2, 3], [2, 3, 1], [3, 1, 3], [1, 3, 2], [3, 2, 2], [2, 2, 1], [2, 1, 3], [1, 3, 2], [3, 2, 3], [2, 3, 1], [3, 1, 3], [1, 3, 1], [3, 1, 2], [1, 2, 3], [2, 3, 2], [3, 2, 1].
Their sums are 6, 6, 7, 6, 7, 5, 6, 6, 8, 6, 7, 5, 6, 6, 7, 6. As (n(n+1))/(2) = 6, the answer is 9.
Submitted Solution:
```
import sys
#import random
from bisect import bisect_right as rb
from collections import deque
#sys.setrecursionlimit(10**8)
from queue import PriorityQueue
from math import *
input_ = lambda: sys.stdin.readline().strip("\r\n")
ii = lambda : int(input_())
il = lambda : list(map(int, input_().split()))
ilf = lambda : list(map(float, input_().split()))
ip = lambda : input_()
fi = lambda : float(input_())
ap = lambda ab,bc,cd : ab[bc].append(cd)
li = lambda : list(input_())
pr = lambda x : print(x)
prinT = lambda x : print(x)
f = lambda : sys.stdout.flush()
mod = 998244353
n = ii()
ans = n
for i in range(2,n+1) :
ans = ((ans-1)*i)%mod
print(ans)
``` | instruction | 0 | 86,626 | 12 | 173,252 |
Yes | output | 1 | 86,626 | 12 | 173,253 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let n be an integer. Consider all permutations on integers 1 to n in lexicographic order, and concatenate them into one big sequence p. For example, if n = 3, then p = [1, 2, 3, 1, 3, 2, 2, 1, 3, 2, 3, 1, 3, 1, 2, 3, 2, 1]. The length of this sequence will be n ⋅ n!.
Let 1 ≤ i ≤ j ≤ n ⋅ n! be a pair of indices. We call the sequence (p_i, p_{i+1}, ..., p_{j-1}, p_j) a subarray of p. Its length is defined as the number of its elements, i.e., j - i + 1. Its sum is the sum of all its elements, i.e., ∑_{k=i}^j p_k.
You are given n. Find the number of subarrays of p of length n having sum (n(n+1))/(2). Since this number may be large, output it modulo 998244353 (a prime number).
Input
The only line contains one integer n (1 ≤ n ≤ 10^6), as described in the problem statement.
Output
Output a single integer — the number of subarrays of length n having sum (n(n+1))/(2), modulo 998244353.
Examples
Input
3
Output
9
Input
4
Output
56
Input
10
Output
30052700
Note
In the first sample, there are 16 subarrays of length 3. In order of appearance, they are:
[1, 2, 3], [2, 3, 1], [3, 1, 3], [1, 3, 2], [3, 2, 2], [2, 2, 1], [2, 1, 3], [1, 3, 2], [3, 2, 3], [2, 3, 1], [3, 1, 3], [1, 3, 1], [3, 1, 2], [1, 2, 3], [2, 3, 2], [3, 2, 1].
Their sums are 6, 6, 7, 6, 7, 5, 6, 6, 8, 6, 7, 5, 6, 6, 7, 6. As (n(n+1))/(2) = 6, the answer is 9.
Submitted Solution:
```
def factorial_mod(n, mod):
ans = 1
for i in range(1, n + 1):
ans = (ans * i) % mod
return ans
def solve(n):
if n == 1:
return 1
elif n == 2:
return 2
mod = 998244353
len_metaseq = factorial_mod(n, mod)
ans = (
((n - 1) + (n - 2)) *
len_metaseq *
499122177 # modinv(2, mod)
) % mod
error = 0
for curr in range(4, n + 1):
error = ((error + 1) * curr) % mod
return (ans - error) % mod
n = int(input())
print(solve(n))
``` | instruction | 0 | 86,627 | 12 | 173,254 |
Yes | output | 1 | 86,627 | 12 | 173,255 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let n be an integer. Consider all permutations on integers 1 to n in lexicographic order, and concatenate them into one big sequence p. For example, if n = 3, then p = [1, 2, 3, 1, 3, 2, 2, 1, 3, 2, 3, 1, 3, 1, 2, 3, 2, 1]. The length of this sequence will be n ⋅ n!.
Let 1 ≤ i ≤ j ≤ n ⋅ n! be a pair of indices. We call the sequence (p_i, p_{i+1}, ..., p_{j-1}, p_j) a subarray of p. Its length is defined as the number of its elements, i.e., j - i + 1. Its sum is the sum of all its elements, i.e., ∑_{k=i}^j p_k.
You are given n. Find the number of subarrays of p of length n having sum (n(n+1))/(2). Since this number may be large, output it modulo 998244353 (a prime number).
Input
The only line contains one integer n (1 ≤ n ≤ 10^6), as described in the problem statement.
Output
Output a single integer — the number of subarrays of length n having sum (n(n+1))/(2), modulo 998244353.
Examples
Input
3
Output
9
Input
4
Output
56
Input
10
Output
30052700
Note
In the first sample, there are 16 subarrays of length 3. In order of appearance, they are:
[1, 2, 3], [2, 3, 1], [3, 1, 3], [1, 3, 2], [3, 2, 2], [2, 2, 1], [2, 1, 3], [1, 3, 2], [3, 2, 3], [2, 3, 1], [3, 1, 3], [1, 3, 1], [3, 1, 2], [1, 2, 3], [2, 3, 2], [3, 2, 1].
Their sums are 6, 6, 7, 6, 7, 5, 6, 6, 8, 6, 7, 5, 6, 6, 7, 6. As (n(n+1))/(2) = 6, the answer is 9.
Submitted Solution:
```
import sys
n = int(input())
M = 998244353
def mod(n,m):
if (n >= 0):
return n % m
else:
n = n % m
return (m+n) % m
if (n > 1):
fact = 2
ans = [0 for i in range(n+1)]
ans[2] = 0
for i in range(3,n+1):
ans[i] = (i * (fact + ans[i-1] - 1)) % M
fact = (fact * i) % M
#print(ans)
sys.stdout.write(str((ans[n]+fact)%M)+"\n")
else:
sys.stdout.write("1\n")
``` | instruction | 0 | 86,628 | 12 | 173,256 |
Yes | output | 1 | 86,628 | 12 | 173,257 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let n be an integer. Consider all permutations on integers 1 to n in lexicographic order, and concatenate them into one big sequence p. For example, if n = 3, then p = [1, 2, 3, 1, 3, 2, 2, 1, 3, 2, 3, 1, 3, 1, 2, 3, 2, 1]. The length of this sequence will be n ⋅ n!.
Let 1 ≤ i ≤ j ≤ n ⋅ n! be a pair of indices. We call the sequence (p_i, p_{i+1}, ..., p_{j-1}, p_j) a subarray of p. Its length is defined as the number of its elements, i.e., j - i + 1. Its sum is the sum of all its elements, i.e., ∑_{k=i}^j p_k.
You are given n. Find the number of subarrays of p of length n having sum (n(n+1))/(2). Since this number may be large, output it modulo 998244353 (a prime number).
Input
The only line contains one integer n (1 ≤ n ≤ 10^6), as described in the problem statement.
Output
Output a single integer — the number of subarrays of length n having sum (n(n+1))/(2), modulo 998244353.
Examples
Input
3
Output
9
Input
4
Output
56
Input
10
Output
30052700
Note
In the first sample, there are 16 subarrays of length 3. In order of appearance, they are:
[1, 2, 3], [2, 3, 1], [3, 1, 3], [1, 3, 2], [3, 2, 2], [2, 2, 1], [2, 1, 3], [1, 3, 2], [3, 2, 3], [2, 3, 1], [3, 1, 3], [1, 3, 1], [3, 1, 2], [1, 2, 3], [2, 3, 2], [3, 2, 1].
Their sums are 6, 6, 7, 6, 7, 5, 6, 6, 8, 6, 7, 5, 6, 6, 7, 6. As (n(n+1))/(2) = 6, the answer is 9.
Submitted Solution:
```
#!/usr/bin/env python
# coding: utf-8
# In[35]:
n=int(input())
# In[36]:
import math
# In[37]:
total=0
total=(n-1)*math.factorial(n)
dsum=0
for i in range(1,n-1):
diff=1
for j in range(0,i):
diff=diff*(n-j)
#print(diff)
dsum+=diff
# In[38]:
if n==1:
print(1)
else:
print(total-dsum)
# In[31]:
``` | instruction | 0 | 86,629 | 12 | 173,258 |
No | output | 1 | 86,629 | 12 | 173,259 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Let n be an integer. Consider all permutations on integers 1 to n in lexicographic order, and concatenate them into one big sequence p. For example, if n = 3, then p = [1, 2, 3, 1, 3, 2, 2, 1, 3, 2, 3, 1, 3, 1, 2, 3, 2, 1]. The length of this sequence will be n ⋅ n!.
Let 1 ≤ i ≤ j ≤ n ⋅ n! be a pair of indices. We call the sequence (p_i, p_{i+1}, ..., p_{j-1}, p_j) a subarray of p. Its length is defined as the number of its elements, i.e., j - i + 1. Its sum is the sum of all its elements, i.e., ∑_{k=i}^j p_k.
You are given n. Find the number of subarrays of p of length n having sum (n(n+1))/(2). Since this number may be large, output it modulo 998244353 (a prime number).
Input
The only line contains one integer n (1 ≤ n ≤ 10^6), as described in the problem statement.
Output
Output a single integer — the number of subarrays of length n having sum (n(n+1))/(2), modulo 998244353.
Examples
Input
3
Output
9
Input
4
Output
56
Input
10
Output
30052700
Note
In the first sample, there are 16 subarrays of length 3. In order of appearance, they are:
[1, 2, 3], [2, 3, 1], [3, 1, 3], [1, 3, 2], [3, 2, 2], [2, 2, 1], [2, 1, 3], [1, 3, 2], [3, 2, 3], [2, 3, 1], [3, 1, 3], [1, 3, 1], [3, 1, 2], [1, 2, 3], [2, 3, 2], [3, 2, 1].
Their sums are 6, 6, 7, 6, 7, 5, 6, 6, 8, 6, 7, 5, 6, 6, 7, 6. As (n(n+1))/(2) = 6, the answer is 9.
Submitted Solution:
```
n = int(input())
if n==1:print(1)
elif n==2:print(2)
else:
res,x=1,n*2
for i in range(3,n+1):
res=((res+i-1)*i-(i-1))%998244353
x=x*i%998244353
print(x-res-n+1)
``` | instruction | 0 | 86,630 | 12 | 173,260 |
No | output | 1 | 86,630 | 12 | 173,261 |
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