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 |
|---|---|---|---|---|---|
Provide tags and a correct Python 3 solution for this coding contest problem.
This is an interactive problem.
Note: the XOR-sum of an array a_1, a_2, …, a_n (1 ≤ a_i ≤ 10^9) is defined as a_1 ⊕ a_2 ⊕ … ⊕ a_n, where ⊕ denotes the [bitwise XOR operation](https://en.wikipedia.org/wiki/Bitwise_operation#XOR).
Little Dor... | instruction | 0 | 82,821 | 12 | 165,642 |
Tags: brute force, constructive algorithms, dp, flows, graphs, greedy, implementation, interactive, shortest paths
Correct Solution:
```
import os
import random
import sys
from collections import deque
from math import inf
random.seed(0)
input = sys.stdin.buffer.readline
DEBUG = False
def solve():
def debug(*... | output | 1 | 82,821 | 12 | 165,643 |
Provide tags and a correct Python 3 solution for this coding contest problem.
This is an interactive problem.
Note: the XOR-sum of an array a_1, a_2, …, a_n (1 ≤ a_i ≤ 10^9) is defined as a_1 ⊕ a_2 ⊕ … ⊕ a_n, where ⊕ denotes the [bitwise XOR operation](https://en.wikipedia.org/wiki/Bitwise_operation#XOR).
Little Dor... | instruction | 0 | 82,822 | 12 | 165,644 |
Tags: brute force, constructive algorithms, dp, flows, graphs, greedy, implementation, interactive, shortest paths
Correct Solution:
```
import sys
import collections
n, k = map(int,input().split())
if n%2 == 1 and k%2 == 0:
sys.stdout.flush()
print("-1")
else:
q = collections.deque()
node... | output | 1 | 82,822 | 12 | 165,645 |
Provide tags and a correct Python 3 solution for this coding contest problem.
This is an interactive problem.
Note: the XOR-sum of an array a_1, a_2, …, a_n (1 ≤ a_i ≤ 10^9) is defined as a_1 ⊕ a_2 ⊕ … ⊕ a_n, where ⊕ denotes the [bitwise XOR operation](https://en.wikipedia.org/wiki/Bitwise_operation#XOR).
Little Dor... | instruction | 0 | 82,823 | 12 | 165,646 |
Tags: brute force, constructive algorithms, dp, flows, graphs, greedy, implementation, interactive, shortest paths
Correct Solution:
```
from sys import stdout
def reverse(n, req):return [x for x in range(1, n + 1) if x not in req]
def solve():
n, k = (int(x) for x in input().split())
if n % 2 == 1 and k % 2 ==... | output | 1 | 82,823 | 12 | 165,647 |
Provide tags and a correct Python 3 solution for this coding contest problem.
This is an interactive problem.
Note: the XOR-sum of an array a_1, a_2, …, a_n (1 ≤ a_i ≤ 10^9) is defined as a_1 ⊕ a_2 ⊕ … ⊕ a_n, where ⊕ denotes the [bitwise XOR operation](https://en.wikipedia.org/wiki/Bitwise_operation#XOR).
Little Dor... | instruction | 0 | 82,824 | 12 | 165,648 |
Tags: brute force, constructive algorithms, dp, flows, graphs, greedy, implementation, interactive, shortest paths
Correct Solution:
```
from heapq import heappush, heappop
def chk(i):
return 1 + (i + N - 1) // N * 2
def arar(i):
A = [1] * N
j = 0
while i:
A[j] += 2
j = (j + 1) % N
... | output | 1 | 82,824 | 12 | 165,649 |
Provide tags and a correct Python 3 solution for this coding contest problem.
This is an interactive problem.
Note: the XOR-sum of an array a_1, a_2, …, a_n (1 ≤ a_i ≤ 10^9) is defined as a_1 ⊕ a_2 ⊕ … ⊕ a_n, where ⊕ denotes the [bitwise XOR operation](https://en.wikipedia.org/wiki/Bitwise_operation#XOR).
Little Dor... | instruction | 0 | 82,825 | 12 | 165,650 |
Tags: brute force, constructive algorithms, dp, flows, graphs, greedy, implementation, interactive, shortest paths
Correct Solution:
```
import sys
input = sys.stdin.readline
n, k = map(int, input().split())
if n % 2 == 1 and k % 2 == 0:
print(-1)
exit()
want = [1] * n
tot = n
curr = 0
while tot % k != 0 o... | output | 1 | 82,825 | 12 | 165,651 |
Provide tags and a correct Python 3 solution for this coding contest problem.
This is an interactive problem.
Note: the XOR-sum of an array a_1, a_2, …, a_n (1 ≤ a_i ≤ 10^9) is defined as a_1 ⊕ a_2 ⊕ … ⊕ a_n, where ⊕ denotes the [bitwise XOR operation](https://en.wikipedia.org/wiki/Bitwise_operation#XOR).
Little Dor... | instruction | 0 | 82,826 | 12 | 165,652 |
Tags: brute force, constructive algorithms, dp, flows, graphs, greedy, implementation, interactive, shortest paths
Correct Solution:
```
from sys import stdin, stdout
input = stdin.readline
############ ---- Input Functions ---- ############
def inp():
return(int(input()))
def inlt():
return(list(map(int,input... | output | 1 | 82,826 | 12 | 165,653 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
This is an interactive problem.
Note: the XOR-sum of an array a_1, a_2, …, a_n (1 ≤ a_i ≤ 10^9) is defined as a_1 ⊕ a_2 ⊕ … ⊕ a_n, where ⊕ denotes the [bitwise XOR operation](https://en.wikiped... | instruction | 0 | 82,827 | 12 | 165,654 |
Yes | output | 1 | 82,827 | 12 | 165,655 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
This is an interactive problem.
Note: the XOR-sum of an array a_1, a_2, …, a_n (1 ≤ a_i ≤ 10^9) is defined as a_1 ⊕ a_2 ⊕ … ⊕ a_n, where ⊕ denotes the [bitwise XOR operation](https://en.wikiped... | instruction | 0 | 82,828 | 12 | 165,656 |
Yes | output | 1 | 82,828 | 12 | 165,657 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
This is an interactive problem.
Note: the XOR-sum of an array a_1, a_2, …, a_n (1 ≤ a_i ≤ 10^9) is defined as a_1 ⊕ a_2 ⊕ … ⊕ a_n, where ⊕ denotes the [bitwise XOR operation](https://en.wikiped... | instruction | 0 | 82,829 | 12 | 165,658 |
Yes | output | 1 | 82,829 | 12 | 165,659 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
This is an interactive problem.
Note: the XOR-sum of an array a_1, a_2, …, a_n (1 ≤ a_i ≤ 10^9) is defined as a_1 ⊕ a_2 ⊕ … ⊕ a_n, where ⊕ denotes the [bitwise XOR operation](https://en.wikiped... | instruction | 0 | 82,830 | 12 | 165,660 |
Yes | output | 1 | 82,830 | 12 | 165,661 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
This is an interactive problem.
Note: the XOR-sum of an array a_1, a_2, …, a_n (1 ≤ a_i ≤ 10^9) is defined as a_1 ⊕ a_2 ⊕ … ⊕ a_n, where ⊕ denotes the [bitwise XOR operation](https://en.wikiped... | instruction | 0 | 82,831 | 12 | 165,662 |
No | output | 1 | 82,831 | 12 | 165,663 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
This is an interactive problem.
Note: the XOR-sum of an array a_1, a_2, …, a_n (1 ≤ a_i ≤ 10^9) is defined as a_1 ⊕ a_2 ⊕ … ⊕ a_n, where ⊕ denotes the [bitwise XOR operation](https://en.wikiped... | instruction | 0 | 82,832 | 12 | 165,664 |
No | output | 1 | 82,832 | 12 | 165,665 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
This is an interactive problem.
Note: the XOR-sum of an array a_1, a_2, …, a_n (1 ≤ a_i ≤ 10^9) is defined as a_1 ⊕ a_2 ⊕ … ⊕ a_n, where ⊕ denotes the [bitwise XOR operation](https://en.wikiped... | instruction | 0 | 82,833 | 12 | 165,666 |
No | output | 1 | 82,833 | 12 | 165,667 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
This is an interactive problem.
Note: the XOR-sum of an array a_1, a_2, …, a_n (1 ≤ a_i ≤ 10^9) is defined as a_1 ⊕ a_2 ⊕ … ⊕ a_n, where ⊕ denotes the [bitwise XOR operation](https://en.wikiped... | instruction | 0 | 82,834 | 12 | 165,668 |
No | output | 1 | 82,834 | 12 | 165,669 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a permutation p of numbers 1, 2, ..., n. Let's define f(p) as the following sum:
<image>
Find the lexicographically m-th permutation of length n in the set of permutations having the maximum possible value of f(p).
Input
Th... | instruction | 0 | 82,942 | 12 | 165,884 |
Tags: brute force
Correct Solution:
```
from itertools import permutations
def f(l):
n = len(l)
res = 0
for i in range(n):
for j in range(i + 1, n + 1):
res += min(l[i:j])
return res
n, m = (int(x) for x in input().split())
res = 0
resl = []
for perm in permutations(range(1, n + 1)):
cur = f(perm)
# print(p... | output | 1 | 82,942 | 12 | 165,885 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a permutation p of numbers 1, 2, ..., n. Let's define f(p) as the following sum:
<image>
Find the lexicographically m-th permutation of length n in the set of permutations having the maximum possible value of f(p).
Input
Th... | instruction | 0 | 82,943 | 12 | 165,886 |
Tags: brute force
Correct Solution:
```
(n,m)=input().split()
(n,m)=(int(n),int(m)-1)
pow2=[]
u=1
for i in range(n):
pow2.append(u)
u*=2
r=[]
k=1
while k<n:
if m<pow2[n-k-1]:
r.append(k)
else:
m-=pow2[n-k-1]
k+=1
z=[]
for i in range(n):
if not (n-i in r):
z.append(n-i)
r+... | output | 1 | 82,943 | 12 | 165,887 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a permutation p of numbers 1, 2, ..., n. Let's define f(p) as the following sum:
<image>
Find the lexicographically m-th permutation of length n in the set of permutations having the maximum possible value of f(p).
Input
Th... | instruction | 0 | 82,944 | 12 | 165,888 |
Tags: brute force
Correct Solution:
```
from itertools import permutations
n, m = [int(i) for i in input().split()]
maxsum = -1
ans = []
for per in permutations(range(1,n+1),n):
thissum = 0
for i in range(n):
for j in range(i,n):
thissum += min(per[i:j+1])
if thissum > maxsum:
ma... | output | 1 | 82,944 | 12 | 165,889 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a permutation p of numbers 1, 2, ..., n. Let's define f(p) as the following sum:
<image>
Find the lexicographically m-th permutation of length n in the set of permutations having the maximum possible value of f(p).
Input
Th... | instruction | 0 | 82,945 | 12 | 165,890 |
Tags: brute force
Correct Solution:
```
#!/usr/bin/python3
def gen(n, start, t):
if n == 1:
return [start]
if t <= 2 ** (n - 2):
return [start] + gen(n - 1, start + 1, t)
else:
return gen(n - 1, start + 1, t - 2 ** (n - 2)) + [start]
n, t = map(int, input().split())
print(" ".join... | output | 1 | 82,945 | 12 | 165,891 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a permutation p of numbers 1, 2, ..., n. Let's define f(p) as the following sum:
<image>
Find the lexicographically m-th permutation of length n in the set of permutations having the maximum possible value of f(p).
Input
Th... | instruction | 0 | 82,946 | 12 | 165,892 |
Tags: brute force
Correct Solution:
```
n, m = [int(x) for x in input().split()]
best = 0
ans = []
def foo(p):
ans = 0
for i in range(n):
for j in range(i,n):
ans += min(p[i:j+1])
return ans
def eval(p):
global ans, best
val = foo(p)
if val > best:
ans = [p]
best = val
elif val == best:
ans.append(... | output | 1 | 82,946 | 12 | 165,893 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a permutation p of numbers 1, 2, ..., n. Let's define f(p) as the following sum:
<image>
Find the lexicographically m-th permutation of length n in the set of permutations having the maximum possible value of f(p).
Input
Th... | instruction | 0 | 82,947 | 12 | 165,894 |
Tags: brute force
Correct Solution:
```
import sys
f = sys.stdin
#f = open('H:\\Portable Python 3.2.5.1\\test_248B1.txt')
n, k = map(int, f.readline().strip().split())
import itertools
def sum_pr(p, n):
s = 0
#print(p)
for i in range(n):
for j in range(i,n):
s += min(p[i:j+1])
... | output | 1 | 82,947 | 12 | 165,895 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a permutation p of numbers 1, 2, ..., n. Let's define f(p) as the following sum:
<image>
Find the lexicographically m-th permutation of length n in the set of permutations having the maximum possible value of f(p).
Input
Th... | instruction | 0 | 82,948 | 12 | 165,896 |
Tags: brute force
Correct Solution:
```
__author__ = 'yushchenko'
def countf(f):
sum = 0
for i in range(len(f)):
for j in range(len(f))[i:]:
# print(i, j)
# print(f[i:j + 1])
sum += min(f[i:j + 1])
return sum
import itertools
n,m = input().split()
n = int(n)
m =... | output | 1 | 82,948 | 12 | 165,897 |
Provide tags and a correct Python 3 solution for this coding contest problem.
You are given a permutation p of numbers 1, 2, ..., n. Let's define f(p) as the following sum:
<image>
Find the lexicographically m-th permutation of length n in the set of permutations having the maximum possible value of f(p).
Input
Th... | instruction | 0 | 82,949 | 12 | 165,898 |
Tags: brute force
Correct Solution:
```
n, m = map(int, input().split());
res = []
num = 0
x = n
for i in range(1, n):
if i not in res:
if pow(2, x - len(res) - 2) + num >= m:
res.append(i);
else:
num += pow(2, x - len(res) - 2);
x -= 1;
i = n;
while i > 0:
if i not in res:
res.append(i);
i -= 1;
fo... | output | 1 | 82,949 | 12 | 165,899 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a permutation p of numbers 1, 2, ..., n. Let's define f(p) as the following sum:
<image>
Find the lexicographically m-th permutation of length n in the set of permutations having... | instruction | 0 | 82,950 | 12 | 165,900 |
Yes | output | 1 | 82,950 | 12 | 165,901 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a permutation p of numbers 1, 2, ..., n. Let's define f(p) as the following sum:
<image>
Find the lexicographically m-th permutation of length n in the set of permutations having... | instruction | 0 | 82,951 | 12 | 165,902 |
Yes | output | 1 | 82,951 | 12 | 165,903 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a permutation p of numbers 1, 2, ..., n. Let's define f(p) as the following sum:
<image>
Find the lexicographically m-th permutation of length n in the set of permutations having... | instruction | 0 | 82,952 | 12 | 165,904 |
Yes | output | 1 | 82,952 | 12 | 165,905 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a permutation p of numbers 1, 2, ..., n. Let's define f(p) as the following sum:
<image>
Find the lexicographically m-th permutation of length n in the set of permutations having... | instruction | 0 | 82,953 | 12 | 165,906 |
Yes | output | 1 | 82,953 | 12 | 165,907 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a permutation p of numbers 1, 2, ..., n. Let's define f(p) as the following sum:
<image>
Find the lexicographically m-th permutation of length n in the set of permutations having... | instruction | 0 | 82,954 | 12 | 165,908 |
No | output | 1 | 82,954 | 12 | 165,909 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a permutation p of numbers 1, 2, ..., n. Let's define f(p) as the following sum:
<image>
Find the lexicographically m-th permutation of length n in the set of permutations having... | instruction | 0 | 82,955 | 12 | 165,910 |
No | output | 1 | 82,955 | 12 | 165,911 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a permutation p of numbers 1, 2, ..., n. Let's define f(p) as the following sum:
<image>
Find the lexicographically m-th permutation of length n in the set of permutations having... | instruction | 0 | 82,956 | 12 | 165,912 |
No | output | 1 | 82,956 | 12 | 165,913 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a permutation p of numbers 1, 2, ..., n. Let's define f(p) as the following sum:
<image>
Find the lexicographically m-th permutation of length n in the set of permutations having... | instruction | 0 | 82,957 | 12 | 165,914 |
No | output | 1 | 82,957 | 12 | 165,915 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Little Mishka enjoys programming. Since her birthday has just passed, her friends decided to present her with array of non-negative integers a1, a2, ..., an of n elements!
Mishka loved the arra... | instruction | 0 | 83,026 | 12 | 166,052 |
No | output | 1 | 83,026 | 12 | 166,053 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Little Mishka enjoys programming. Since her birthday has just passed, her friends decided to present her with array of non-negative integers a1, a2, ..., an of n elements!
Mishka loved the arra... | instruction | 0 | 83,027 | 12 | 166,054 |
No | output | 1 | 83,027 | 12 | 166,055 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Little Mishka enjoys programming. Since her birthday has just passed, her friends decided to present her with array of non-negative integers a1, a2, ..., an of n elements!
Mishka loved the arra... | instruction | 0 | 83,028 | 12 | 166,056 |
No | output | 1 | 83,028 | 12 | 166,057 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Little Mishka enjoys programming. Since her birthday has just passed, her friends decided to present her with array of non-negative integers a1, a2, ..., an of n elements!
Mishka loved the arra... | instruction | 0 | 83,029 | 12 | 166,058 |
No | output | 1 | 83,029 | 12 | 166,059 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A year ago on the bench in public park Leha found an array of n numbers. Leha believes that permutation p is right if for all 1 ≤ i < n condition, that api·api + 1 is not perfect square, holds. ... | instruction | 0 | 83,083 | 12 | 166,166 |
No | output | 1 | 83,083 | 12 | 166,167 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A year ago on the bench in public park Leha found an array of n numbers. Leha believes that permutation p is right if for all 1 ≤ i < n condition, that api·api + 1 is not perfect square, holds. ... | instruction | 0 | 83,084 | 12 | 166,168 |
No | output | 1 | 83,084 | 12 | 166,169 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A year ago on the bench in public park Leha found an array of n numbers. Leha believes that permutation p is right if for all 1 ≤ i < n condition, that api·api + 1 is not perfect square, holds. ... | instruction | 0 | 83,085 | 12 | 166,170 |
No | output | 1 | 83,085 | 12 | 166,171 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A year ago on the bench in public park Leha found an array of n numbers. Leha believes that permutation p is right if for all 1 ≤ i < n condition, that api·api + 1 is not perfect square, holds. ... | instruction | 0 | 83,086 | 12 | 166,172 |
No | output | 1 | 83,086 | 12 | 166,173 |
Provide tags and a correct Python 3 solution for this coding contest problem.
A permutation of size n is an array of size n such that each integer from 1 to n occurs exactly once in this array. An inversion in a permutation p is a pair of indices (i, j) such that i > j and a_i < a_j. For example, a permutation [4, 1, ... | instruction | 0 | 83,396 | 12 | 166,792 |
Tags: dp, math, probabilities
Correct Solution:
```
def divisors(M):
d=[]
i=1
while M>=i**2:
if M%i==0:
d.append(i)
if i**2!=M:
d.append(M//i)
i=i+1
return d
def popcount(x):
x = x - ((x >> 1) & 0x55555555)
x = (x & 0x33333333) + ((x >> 2)... | output | 1 | 83,396 | 12 | 166,793 |
Provide tags and a correct Python 3 solution for this coding contest problem.
A permutation of size n is an array of size n such that each integer from 1 to n occurs exactly once in this array. An inversion in a permutation p is a pair of indices (i, j) such that i > j and a_i < a_j. For example, a permutation [4, 1, ... | instruction | 0 | 83,397 | 12 | 166,794 |
Tags: dp, math, probabilities
Correct Solution:
```
import sys
from array import array # noqa: F401
import typing as Tp # noqa: F401
def input():
return sys.stdin.buffer.readline().decode('utf-8')
T = Tp.TypeVar('T')
class FenwickSum(Tp.Generic[T]):
__slots__ = ['nodes', 'size', 'unit']
def __init_... | output | 1 | 83,397 | 12 | 166,795 |
Provide tags and a correct Python 3 solution for this coding contest problem.
A permutation of size n is an array of size n such that each integer from 1 to n occurs exactly once in this array. An inversion in a permutation p is a pair of indices (i, j) such that i > j and a_i < a_j. For example, a permutation [4, 1, ... | instruction | 0 | 83,398 | 12 | 166,796 |
Tags: dp, math, probabilities
Correct Solution:
```
base=998244353;
def power(x, y):
if(y==0):
return 1
t=power(x, y//2)
t=(t*t)%base
if(y%2):
t=(t*x)%base
return t;
def inverse(x):
return power(x, base-2)
ft=[0]
for i in range(0, 200000):
ft.append(0)
def get(i):
res=0
... | output | 1 | 83,398 | 12 | 166,797 |
Provide tags and a correct Python 3 solution for this coding contest problem.
A permutation of size n is an array of size n such that each integer from 1 to n occurs exactly once in this array. An inversion in a permutation p is a pair of indices (i, j) such that i > j and a_i < a_j. For example, a permutation [4, 1, ... | instruction | 0 | 83,399 | 12 | 166,798 |
Tags: dp, math, probabilities
Correct Solution:
```
n = int(input())
L = [int(x) for x in input().split()]
D = {}
J = []
S = []
T = [0]*(n+1)
for i in range(n):
if L[i] > 0:
D[L[i]] = i
J.append(L[i])
T[i+1] = T[i]
else:
T[i+1] = T[i]+1
def I(J):
if len(J) <= 1:
... | output | 1 | 83,399 | 12 | 166,799 |
Provide tags and a correct Python 3 solution for this coding contest problem.
A permutation of size n is an array of size n such that each integer from 1 to n occurs exactly once in this array. An inversion in a permutation p is a pair of indices (i, j) such that i > j and a_i < a_j. For example, a permutation [4, 1, ... | instruction | 0 | 83,400 | 12 | 166,800 |
Tags: dp, math, probabilities
Correct Solution:
```
def merge(a,b):
inda=0
indb=0
lena=len(a)
lenb=len(b)
d=[a[-1]+b[-1]+1000]
a+=d
b+=d
c=[]
inversions=0
for i in range(lena+lenb):
if a[inda]<b[indb]:
c.append(a[inda])
inda+=1
else:
... | output | 1 | 83,400 | 12 | 166,801 |
Provide tags and a correct Python 3 solution for this coding contest problem.
A permutation of size n is an array of size n such that each integer from 1 to n occurs exactly once in this array. An inversion in a permutation p is a pair of indices (i, j) such that i > j and a_i < a_j. For example, a permutation [4, 1, ... | instruction | 0 | 83,401 | 12 | 166,802 |
Tags: dp, math, probabilities
Correct Solution:
```
K = 998244353
def mu(a, n):
if n == 0: return 1
q = mu(a, n // 2)
if n % 2 == 0: return q * q % K
return q * q % K * a % K
MAXN = 200005
dd = [0 for i in range(MAXN)]
p = [0 for i in range(MAXN)]
s = [0 for i in range(MAXN)]
a = [0 for i in range(MAXN)]
fen = [0 f... | output | 1 | 83,401 | 12 | 166,803 |
Provide tags and a correct Python 3 solution for this coding contest problem.
A permutation of size n is an array of size n such that each integer from 1 to n occurs exactly once in this array. An inversion in a permutation p is a pair of indices (i, j) such that i > j and a_i < a_j. For example, a permutation [4, 1, ... | instruction | 0 | 83,402 | 12 | 166,804 |
Tags: dp, math, probabilities
Correct Solution:
```
import sys
input = sys.stdin.readline
n=int(input())
P=list(map(int,input().split()))
mod=998244353
INV=[None]*(n+1)#1/aのリストを予め作っておく.
for i in range(1,n+1):
INV[i]=pow(i,mod-2,mod)
BLA=P.count(-1)
if BLA==0 or BLA==1:
ANS=0
else:
LEFT=BLA*(BLA-1)//2*IN... | output | 1 | 83,402 | 12 | 166,805 |
Provide tags and a correct Python 3 solution for this coding contest problem.
A permutation of size n is an array of size n such that each integer from 1 to n occurs exactly once in this array. An inversion in a permutation p is a pair of indices (i, j) such that i > j and a_i < a_j. For example, a permutation [4, 1, ... | instruction | 0 | 83,403 | 12 | 166,806 |
Tags: dp, math, probabilities
Correct Solution:
```
MOD = 998244353
def power(x, n) :
ans = 1
while (n) :
if ((n & 1) == 1) :
ans = ans * x % MOD
x = x * x % MOD
n = n // 2
return ans
n = int(input())
a = list(map(int, input().split()))
b = [0 for i in range(n + 1)]
def... | output | 1 | 83,403 | 12 | 166,807 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A permutation of size n is an array of size n such that each integer from 1 to n occurs exactly once in this array. An inversion in a permutation p is a pair of indices (i, j) such that i > j an... | instruction | 0 | 83,404 | 12 | 166,808 |
No | output | 1 | 83,404 | 12 | 166,809 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A permutation of size n is an array of size n such that each integer from 1 to n occurs exactly once in this array. An inversion in a permutation p is a pair of indices (i, j) such that i > j an... | instruction | 0 | 83,405 | 12 | 166,810 |
No | output | 1 | 83,405 | 12 | 166,811 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A permutation of size n is an array of size n such that each integer from 1 to n occurs exactly once in this array. An inversion in a permutation p is a pair of indices (i, j) such that i > j an... | instruction | 0 | 83,406 | 12 | 166,812 |
No | output | 1 | 83,406 | 12 | 166,813 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A permutation of size n is an array of size n such that each integer from 1 to n occurs exactly once in this array. An inversion in a permutation p is a pair of indices (i, j) such that i > j an... | instruction | 0 | 83,407 | 12 | 166,814 |
No | output | 1 | 83,407 | 12 | 166,815 |
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