message stringlengths 2 11.9k | message_type stringclasses 2 values | message_id int64 0 1 | conversation_id int64 137 108k | cluster float64 18 18 | __index_level_0__ int64 274 217k |
|---|---|---|---|---|---|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Recently Adaltik discovered japanese crosswords. Japanese crossword is a picture, represented as a table sized a ร b squares, and each square is colored white or black. There are integers to the left of the rows and to the top of the columns, encrypting the corresponding row or column. The number of integers represents how many groups of black squares there are in corresponding row or column, and the integers themselves represents the number of consecutive black squares in corresponding group (you can find more detailed explanation in Wikipedia <https://en.wikipedia.org/wiki/Japanese_crossword>).
Adaltik decided that the general case of japanese crossword is too complicated and drew a row consisting of n squares (e.g. japanese crossword sized 1 ร n), which he wants to encrypt in the same way as in japanese crossword.
<image> The example of encrypting of a single row of japanese crossword.
Help Adaltik find the numbers encrypting the row he drew.
Input
The first line of the input contains a single integer n (1 โค n โค 100) โ the length of the row. The second line of the input contains a single string consisting of n characters 'B' or 'W', ('B' corresponds to black square, 'W' โ to white square in the row that Adaltik drew).
Output
The first line should contain a single integer k โ the number of integers encrypting the row, e.g. the number of groups of black squares in the row.
The second line should contain k integers, encrypting the row, e.g. corresponding to sizes of groups of consecutive black squares in the order from left to right.
Examples
Input
3
BBW
Output
1
2
Input
5
BWBWB
Output
3
1 1 1
Input
4
WWWW
Output
0
Input
4
BBBB
Output
1
4
Input
13
WBBBBWWBWBBBW
Output
3
4 1 3
Note
The last sample case correspond to the picture in the statement.
Submitted Solution:
```
import math
import sys
n = input()
a = input()
n = int(n)
hmc = 0
count = 0
for i in range(n-1):
if (a[i] == 'B'):
count += 1;
if (a[i] == 'B' and a[i+1] == 'W'):
print(count)
hmc+=1
count = 0
print(hmc)
if (a[n-1] == 'B'):
print(count+1)
``` | instruction | 0 | 17,295 | 18 | 34,590 |
No | output | 1 | 17,295 | 18 | 34,591 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Recently Adaltik discovered japanese crosswords. Japanese crossword is a picture, represented as a table sized a ร b squares, and each square is colored white or black. There are integers to the left of the rows and to the top of the columns, encrypting the corresponding row or column. The number of integers represents how many groups of black squares there are in corresponding row or column, and the integers themselves represents the number of consecutive black squares in corresponding group (you can find more detailed explanation in Wikipedia <https://en.wikipedia.org/wiki/Japanese_crossword>).
Adaltik decided that the general case of japanese crossword is too complicated and drew a row consisting of n squares (e.g. japanese crossword sized 1 ร n), which he wants to encrypt in the same way as in japanese crossword.
<image> The example of encrypting of a single row of japanese crossword.
Help Adaltik find the numbers encrypting the row he drew.
Input
The first line of the input contains a single integer n (1 โค n โค 100) โ the length of the row. The second line of the input contains a single string consisting of n characters 'B' or 'W', ('B' corresponds to black square, 'W' โ to white square in the row that Adaltik drew).
Output
The first line should contain a single integer k โ the number of integers encrypting the row, e.g. the number of groups of black squares in the row.
The second line should contain k integers, encrypting the row, e.g. corresponding to sizes of groups of consecutive black squares in the order from left to right.
Examples
Input
3
BBW
Output
1
2
Input
5
BWBWB
Output
3
1 1 1
Input
4
WWWW
Output
0
Input
4
BBBB
Output
1
4
Input
13
WBBBBWWBWBBBW
Output
3
4 1 3
Note
The last sample case correspond to the picture in the statement.
Submitted Solution:
```
row_length = int(input())
row_str = input()
def picross(row_length, row_str):
groups_count = 0
group_size = 0
size_list = []
for i in range(row_length):
if i == 0 and row_str[i] == 'B' or (row_str[i] == 'B' and row_str[i - 1] == 'W'):
groups_count += 1
group_size += 1
if i == row_length - 1:
size_list.append(group_size)
# print('appended B')
elif row_str[i - 1] == 'B' and row_str[i] == 'B':
group_size += 1
if i == row_length - 1:
size_list.append(group_size)
# print('appended B')
elif row_str[i] == 'W':
if group_size > 0:
size_list.append(group_size)
# print('appended W')
group_size = 0
# print(group_size)
if not size_list:
size_list.append(0)
print(groups_count)
print(*size_list)
picross(row_length, row_str)
``` | instruction | 0 | 17,296 | 18 | 34,592 |
No | output | 1 | 17,296 | 18 | 34,593 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Recently Adaltik discovered japanese crosswords. Japanese crossword is a picture, represented as a table sized a ร b squares, and each square is colored white or black. There are integers to the left of the rows and to the top of the columns, encrypting the corresponding row or column. The number of integers represents how many groups of black squares there are in corresponding row or column, and the integers themselves represents the number of consecutive black squares in corresponding group (you can find more detailed explanation in Wikipedia <https://en.wikipedia.org/wiki/Japanese_crossword>).
Adaltik decided that the general case of japanese crossword is too complicated and drew a row consisting of n squares (e.g. japanese crossword sized 1 ร n), which he wants to encrypt in the same way as in japanese crossword.
<image> The example of encrypting of a single row of japanese crossword.
Help Adaltik find the numbers encrypting the row he drew.
Input
The first line of the input contains a single integer n (1 โค n โค 100) โ the length of the row. The second line of the input contains a single string consisting of n characters 'B' or 'W', ('B' corresponds to black square, 'W' โ to white square in the row that Adaltik drew).
Output
The first line should contain a single integer k โ the number of integers encrypting the row, e.g. the number of groups of black squares in the row.
The second line should contain k integers, encrypting the row, e.g. corresponding to sizes of groups of consecutive black squares in the order from left to right.
Examples
Input
3
BBW
Output
1
2
Input
5
BWBWB
Output
3
1 1 1
Input
4
WWWW
Output
0
Input
4
BBBB
Output
1
4
Input
13
WBBBBWWBWBBBW
Output
3
4 1 3
Note
The last sample case correspond to the picture in the statement.
Submitted Solution:
```
charNum = int(input())
string = input()
k = 0
ans = ""
for i in range(0,len(string)):
if string[i] == "B":
k += 1
else:
if k > 0:
ans += str(k)+ " "
k = 0
ansNum = ans[:-1].split(" ")
print(len(ansNum))
print(ans)
``` | instruction | 0 | 17,297 | 18 | 34,594 |
No | output | 1 | 17,297 | 18 | 34,595 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Valentin participates in a show called "Shockers". The rules are quite easy: jury selects one letter which Valentin doesn't know. He should make a small speech, but every time he pronounces a word that contains the selected letter, he receives an electric shock. He can make guesses which letter is selected, but for each incorrect guess he receives an electric shock too. The show ends when Valentin guesses the selected letter correctly.
Valentin can't keep in mind everything, so he could guess the selected letter much later than it can be uniquely determined and get excessive electric shocks. Excessive electric shocks are those which Valentin got after the moment the selected letter can be uniquely determined. You should find out the number of excessive electric shocks.
Input
The first line contains a single integer n (1 โค n โค 105) โ the number of actions Valentin did.
The next n lines contain descriptions of his actions, each line contains description of one action. Each action can be of one of three types:
1. Valentin pronounced some word and didn't get an electric shock. This action is described by the string ". w" (without quotes), in which "." is a dot (ASCII-code 46), and w is the word that Valentin said.
2. Valentin pronounced some word and got an electric shock. This action is described by the string "! w" (without quotes), in which "!" is an exclamation mark (ASCII-code 33), and w is the word that Valentin said.
3. Valentin made a guess about the selected letter. This action is described by the string "? s" (without quotes), in which "?" is a question mark (ASCII-code 63), and s is the guess โ a lowercase English letter.
All words consist only of lowercase English letters. The total length of all words does not exceed 105.
It is guaranteed that last action is a guess about the selected letter. Also, it is guaranteed that Valentin didn't make correct guesses about the selected letter before the last action. Moreover, it's guaranteed that if Valentin got an electric shock after pronouncing some word, then it contains the selected letter; and also if Valentin didn't get an electric shock after pronouncing some word, then it does not contain the selected letter.
Output
Output a single integer โ the number of electric shocks that Valentin could have avoided if he had told the selected letter just after it became uniquely determined.
Examples
Input
5
! abc
. ad
. b
! cd
? c
Output
1
Input
8
! hello
! codeforces
? c
. o
? d
? h
. l
? e
Output
2
Input
7
! ababahalamaha
? a
? b
? a
? b
? a
? h
Output
0
Note
In the first test case after the first action it becomes clear that the selected letter is one of the following: a, b, c. After the second action we can note that the selected letter is not a. Valentin tells word "b" and doesn't get a shock. After that it is clear that the selected letter is c, but Valentin pronounces the word cd and gets an excessive electric shock.
In the second test case after the first two electric shocks we understand that the selected letter is e or o. Valentin tries some words consisting of these letters and after the second word it's clear that the selected letter is e, but Valentin makes 3 more actions before he makes a correct hypothesis.
In the third example the selected letter can be uniquely determined only when Valentin guesses it, so he didn't get excessive electric shocks.
Submitted Solution:
```
n=int(input())
let=set('qwertyuiopasdfghjklzxcvbnm')
gotcha=False
k=0
for i in range(n-1):
s=input()
if gotcha and s[0] in '!?':
k+=1
else:
if s[0]=='.':
let.difference_update(s[2:])
elif s[0]=='!':
let.intersection_update(s[2:])
else:
if s[2] in let:
let.remove(s[2])
if len(let)==1:
gotcha=True
input()
print(k)
``` | instruction | 0 | 17,384 | 18 | 34,768 |
Yes | output | 1 | 17,384 | 18 | 34,769 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Valentin participates in a show called "Shockers". The rules are quite easy: jury selects one letter which Valentin doesn't know. He should make a small speech, but every time he pronounces a word that contains the selected letter, he receives an electric shock. He can make guesses which letter is selected, but for each incorrect guess he receives an electric shock too. The show ends when Valentin guesses the selected letter correctly.
Valentin can't keep in mind everything, so he could guess the selected letter much later than it can be uniquely determined and get excessive electric shocks. Excessive electric shocks are those which Valentin got after the moment the selected letter can be uniquely determined. You should find out the number of excessive electric shocks.
Input
The first line contains a single integer n (1 โค n โค 105) โ the number of actions Valentin did.
The next n lines contain descriptions of his actions, each line contains description of one action. Each action can be of one of three types:
1. Valentin pronounced some word and didn't get an electric shock. This action is described by the string ". w" (without quotes), in which "." is a dot (ASCII-code 46), and w is the word that Valentin said.
2. Valentin pronounced some word and got an electric shock. This action is described by the string "! w" (without quotes), in which "!" is an exclamation mark (ASCII-code 33), and w is the word that Valentin said.
3. Valentin made a guess about the selected letter. This action is described by the string "? s" (without quotes), in which "?" is a question mark (ASCII-code 63), and s is the guess โ a lowercase English letter.
All words consist only of lowercase English letters. The total length of all words does not exceed 105.
It is guaranteed that last action is a guess about the selected letter. Also, it is guaranteed that Valentin didn't make correct guesses about the selected letter before the last action. Moreover, it's guaranteed that if Valentin got an electric shock after pronouncing some word, then it contains the selected letter; and also if Valentin didn't get an electric shock after pronouncing some word, then it does not contain the selected letter.
Output
Output a single integer โ the number of electric shocks that Valentin could have avoided if he had told the selected letter just after it became uniquely determined.
Examples
Input
5
! abc
. ad
. b
! cd
? c
Output
1
Input
8
! hello
! codeforces
? c
. o
? d
? h
. l
? e
Output
2
Input
7
! ababahalamaha
? a
? b
? a
? b
? a
? h
Output
0
Note
In the first test case after the first action it becomes clear that the selected letter is one of the following: a, b, c. After the second action we can note that the selected letter is not a. Valentin tells word "b" and doesn't get a shock. After that it is clear that the selected letter is c, but Valentin pronounces the word cd and gets an excessive electric shock.
In the second test case after the first two electric shocks we understand that the selected letter is e or o. Valentin tries some words consisting of these letters and after the second word it's clear that the selected letter is e, but Valentin makes 3 more actions before he makes a correct hypothesis.
In the third example the selected letter can be uniquely determined only when Valentin guesses it, so he didn't get excessive electric shocks.
Submitted Solution:
```
n = int(input())
rec = set("abcdefghijklmnopqrstuvwxyz")
num = 0
for i in range(n):
a, b = input().split()
if i == n - 1:
continue
if len(rec) == 1:
if a == "?" or a == "!":
num += 1
elif a == "!":
rec = rec & set(b)
else:
rec = rec - set(b)
print(num)
``` | instruction | 0 | 17,385 | 18 | 34,770 |
Yes | output | 1 | 17,385 | 18 | 34,771 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Valentin participates in a show called "Shockers". The rules are quite easy: jury selects one letter which Valentin doesn't know. He should make a small speech, but every time he pronounces a word that contains the selected letter, he receives an electric shock. He can make guesses which letter is selected, but for each incorrect guess he receives an electric shock too. The show ends when Valentin guesses the selected letter correctly.
Valentin can't keep in mind everything, so he could guess the selected letter much later than it can be uniquely determined and get excessive electric shocks. Excessive electric shocks are those which Valentin got after the moment the selected letter can be uniquely determined. You should find out the number of excessive electric shocks.
Input
The first line contains a single integer n (1 โค n โค 105) โ the number of actions Valentin did.
The next n lines contain descriptions of his actions, each line contains description of one action. Each action can be of one of three types:
1. Valentin pronounced some word and didn't get an electric shock. This action is described by the string ". w" (without quotes), in which "." is a dot (ASCII-code 46), and w is the word that Valentin said.
2. Valentin pronounced some word and got an electric shock. This action is described by the string "! w" (without quotes), in which "!" is an exclamation mark (ASCII-code 33), and w is the word that Valentin said.
3. Valentin made a guess about the selected letter. This action is described by the string "? s" (without quotes), in which "?" is a question mark (ASCII-code 63), and s is the guess โ a lowercase English letter.
All words consist only of lowercase English letters. The total length of all words does not exceed 105.
It is guaranteed that last action is a guess about the selected letter. Also, it is guaranteed that Valentin didn't make correct guesses about the selected letter before the last action. Moreover, it's guaranteed that if Valentin got an electric shock after pronouncing some word, then it contains the selected letter; and also if Valentin didn't get an electric shock after pronouncing some word, then it does not contain the selected letter.
Output
Output a single integer โ the number of electric shocks that Valentin could have avoided if he had told the selected letter just after it became uniquely determined.
Examples
Input
5
! abc
. ad
. b
! cd
? c
Output
1
Input
8
! hello
! codeforces
? c
. o
? d
? h
. l
? e
Output
2
Input
7
! ababahalamaha
? a
? b
? a
? b
? a
? h
Output
0
Note
In the first test case after the first action it becomes clear that the selected letter is one of the following: a, b, c. After the second action we can note that the selected letter is not a. Valentin tells word "b" and doesn't get a shock. After that it is clear that the selected letter is c, but Valentin pronounces the word cd and gets an excessive electric shock.
In the second test case after the first two electric shocks we understand that the selected letter is e or o. Valentin tries some words consisting of these letters and after the second word it's clear that the selected letter is e, but Valentin makes 3 more actions before he makes a correct hypothesis.
In the third example the selected letter can be uniquely determined only when Valentin guesses it, so he didn't get excessive electric shocks.
Submitted Solution:
```
#Code by Sounak, IIESTS
#------------------------------warmup----------------------------
import os
import sys
import math
from io import BytesIO, IOBase
from fractions import Fraction
import collections
from itertools import permutations
from collections import defaultdict
BUFSIZE = 8192
class FastIO(IOBase):
newlines = 0
def __init__(self, file):
self._fd = file.fileno()
self.buffer = BytesIO()
self.writable = "x" in file.mode or "r" not in file.mode
self.write = self.buffer.write if self.writable else None
def read(self):
while True:
b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
if not b:
break
ptr = self.buffer.tell()
self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
self.newlines = 0
return self.buffer.read()
def readline(self):
while self.newlines == 0:
b = os.read(self._fd, max(os.fstat(self._fd).st_size, BUFSIZE))
self.newlines = b.count(b"\n") + (not b)
ptr = self.buffer.tell()
self.buffer.seek(0, 2), self.buffer.write(b), self.buffer.seek(ptr)
self.newlines -= 1
return self.buffer.readline()
def flush(self):
if self.writable:
os.write(self._fd, self.buffer.getvalue())
self.buffer.truncate(0), self.buffer.seek(0)
class IOWrapper(IOBase):
def __init__(self, file):
self.buffer = FastIO(file)
self.flush = self.buffer.flush
self.writable = self.buffer.writable
self.write = lambda s: self.buffer.write(s.encode("ascii"))
self.read = lambda: self.buffer.read().decode("ascii")
self.readline = lambda: self.buffer.readline().decode("ascii")
sys.stdin, sys.stdout = IOWrapper(sys.stdin), IOWrapper(sys.stdout)
input = lambda: sys.stdin.readline().rstrip("\r\n")
#-------------------game starts now-----------------------------------------------------
k, L = 0, set('abcdefghijklmnopqrstuvwxyz')
for _ in range(int(input()) - 1):
a, w = input().split()
if a == '.':
L -= set(w)
elif a == '!':
k, L = k + (len(L) < 2), L & set(w)
elif len(L) > 1:
L -= {w}
else:
k += 1
print(k)
``` | instruction | 0 | 17,386 | 18 | 34,772 |
Yes | output | 1 | 17,386 | 18 | 34,773 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Valentin participates in a show called "Shockers". The rules are quite easy: jury selects one letter which Valentin doesn't know. He should make a small speech, but every time he pronounces a word that contains the selected letter, he receives an electric shock. He can make guesses which letter is selected, but for each incorrect guess he receives an electric shock too. The show ends when Valentin guesses the selected letter correctly.
Valentin can't keep in mind everything, so he could guess the selected letter much later than it can be uniquely determined and get excessive electric shocks. Excessive electric shocks are those which Valentin got after the moment the selected letter can be uniquely determined. You should find out the number of excessive electric shocks.
Input
The first line contains a single integer n (1 โค n โค 105) โ the number of actions Valentin did.
The next n lines contain descriptions of his actions, each line contains description of one action. Each action can be of one of three types:
1. Valentin pronounced some word and didn't get an electric shock. This action is described by the string ". w" (without quotes), in which "." is a dot (ASCII-code 46), and w is the word that Valentin said.
2. Valentin pronounced some word and got an electric shock. This action is described by the string "! w" (without quotes), in which "!" is an exclamation mark (ASCII-code 33), and w is the word that Valentin said.
3. Valentin made a guess about the selected letter. This action is described by the string "? s" (without quotes), in which "?" is a question mark (ASCII-code 63), and s is the guess โ a lowercase English letter.
All words consist only of lowercase English letters. The total length of all words does not exceed 105.
It is guaranteed that last action is a guess about the selected letter. Also, it is guaranteed that Valentin didn't make correct guesses about the selected letter before the last action. Moreover, it's guaranteed that if Valentin got an electric shock after pronouncing some word, then it contains the selected letter; and also if Valentin didn't get an electric shock after pronouncing some word, then it does not contain the selected letter.
Output
Output a single integer โ the number of electric shocks that Valentin could have avoided if he had told the selected letter just after it became uniquely determined.
Examples
Input
5
! abc
. ad
. b
! cd
? c
Output
1
Input
8
! hello
! codeforces
? c
. o
? d
? h
. l
? e
Output
2
Input
7
! ababahalamaha
? a
? b
? a
? b
? a
? h
Output
0
Note
In the first test case after the first action it becomes clear that the selected letter is one of the following: a, b, c. After the second action we can note that the selected letter is not a. Valentin tells word "b" and doesn't get a shock. After that it is clear that the selected letter is c, but Valentin pronounces the word cd and gets an excessive electric shock.
In the second test case after the first two electric shocks we understand that the selected letter is e or o. Valentin tries some words consisting of these letters and after the second word it's clear that the selected letter is e, but Valentin makes 3 more actions before he makes a correct hypothesis.
In the third example the selected letter can be uniquely determined only when Valentin guesses it, so he didn't get excessive electric shocks.
Submitted Solution:
```
n = int(input())
susp = set([chr(ord('a') + i) for i in range(ord('z') - ord('a') + 1)])
ok = set()
q = 0
ans = 0
for i in range(n):
act, word = input().split()
if act == '!':
susp = susp & set(list(word)) - ok
ans += q
elif act == '.':
ok |= set(list(word))
susp -= ok
elif act == '?':
ok.add(word)
susp.discard(word)
ans += q
# print(susp, ok)
if len(susp) == 1:
q = 1
print(max(ans - 1, 0))
``` | instruction | 0 | 17,387 | 18 | 34,774 |
Yes | output | 1 | 17,387 | 18 | 34,775 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Valentin participates in a show called "Shockers". The rules are quite easy: jury selects one letter which Valentin doesn't know. He should make a small speech, but every time he pronounces a word that contains the selected letter, he receives an electric shock. He can make guesses which letter is selected, but for each incorrect guess he receives an electric shock too. The show ends when Valentin guesses the selected letter correctly.
Valentin can't keep in mind everything, so he could guess the selected letter much later than it can be uniquely determined and get excessive electric shocks. Excessive electric shocks are those which Valentin got after the moment the selected letter can be uniquely determined. You should find out the number of excessive electric shocks.
Input
The first line contains a single integer n (1 โค n โค 105) โ the number of actions Valentin did.
The next n lines contain descriptions of his actions, each line contains description of one action. Each action can be of one of three types:
1. Valentin pronounced some word and didn't get an electric shock. This action is described by the string ". w" (without quotes), in which "." is a dot (ASCII-code 46), and w is the word that Valentin said.
2. Valentin pronounced some word and got an electric shock. This action is described by the string "! w" (without quotes), in which "!" is an exclamation mark (ASCII-code 33), and w is the word that Valentin said.
3. Valentin made a guess about the selected letter. This action is described by the string "? s" (without quotes), in which "?" is a question mark (ASCII-code 63), and s is the guess โ a lowercase English letter.
All words consist only of lowercase English letters. The total length of all words does not exceed 105.
It is guaranteed that last action is a guess about the selected letter. Also, it is guaranteed that Valentin didn't make correct guesses about the selected letter before the last action. Moreover, it's guaranteed that if Valentin got an electric shock after pronouncing some word, then it contains the selected letter; and also if Valentin didn't get an electric shock after pronouncing some word, then it does not contain the selected letter.
Output
Output a single integer โ the number of electric shocks that Valentin could have avoided if he had told the selected letter just after it became uniquely determined.
Examples
Input
5
! abc
. ad
. b
! cd
? c
Output
1
Input
8
! hello
! codeforces
? c
. o
? d
? h
. l
? e
Output
2
Input
7
! ababahalamaha
? a
? b
? a
? b
? a
? h
Output
0
Note
In the first test case after the first action it becomes clear that the selected letter is one of the following: a, b, c. After the second action we can note that the selected letter is not a. Valentin tells word "b" and doesn't get a shock. After that it is clear that the selected letter is c, but Valentin pronounces the word cd and gets an excessive electric shock.
In the second test case after the first two electric shocks we understand that the selected letter is e or o. Valentin tries some words consisting of these letters and after the second word it's clear that the selected letter is e, but Valentin makes 3 more actions before he makes a correct hypothesis.
In the third example the selected letter can be uniquely determined only when Valentin guesses it, so he didn't get excessive electric shocks.
Submitted Solution:
```
import sys
input=sys.stdin.readline
candi=set(list("abcdefghijklmnopqrstuvwxyz"))
n=int(input())
cnt=0
for _ in range(n):
s=list(input().rstrip().split())
if s[0]==".":
x=set(list(s[1]))
candi=candi-x
elif s[0]=="!":
x=set(list(s[1]))
if len(candi)==1:
cnt+=1
candi=candi&x
else:
c=s[1]
if len(candi)==1 and (not c in candi):
cnt+=1
print(cnt)
``` | instruction | 0 | 17,388 | 18 | 34,776 |
No | output | 1 | 17,388 | 18 | 34,777 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Valentin participates in a show called "Shockers". The rules are quite easy: jury selects one letter which Valentin doesn't know. He should make a small speech, but every time he pronounces a word that contains the selected letter, he receives an electric shock. He can make guesses which letter is selected, but for each incorrect guess he receives an electric shock too. The show ends when Valentin guesses the selected letter correctly.
Valentin can't keep in mind everything, so he could guess the selected letter much later than it can be uniquely determined and get excessive electric shocks. Excessive electric shocks are those which Valentin got after the moment the selected letter can be uniquely determined. You should find out the number of excessive electric shocks.
Input
The first line contains a single integer n (1 โค n โค 105) โ the number of actions Valentin did.
The next n lines contain descriptions of his actions, each line contains description of one action. Each action can be of one of three types:
1. Valentin pronounced some word and didn't get an electric shock. This action is described by the string ". w" (without quotes), in which "." is a dot (ASCII-code 46), and w is the word that Valentin said.
2. Valentin pronounced some word and got an electric shock. This action is described by the string "! w" (without quotes), in which "!" is an exclamation mark (ASCII-code 33), and w is the word that Valentin said.
3. Valentin made a guess about the selected letter. This action is described by the string "? s" (without quotes), in which "?" is a question mark (ASCII-code 63), and s is the guess โ a lowercase English letter.
All words consist only of lowercase English letters. The total length of all words does not exceed 105.
It is guaranteed that last action is a guess about the selected letter. Also, it is guaranteed that Valentin didn't make correct guesses about the selected letter before the last action. Moreover, it's guaranteed that if Valentin got an electric shock after pronouncing some word, then it contains the selected letter; and also if Valentin didn't get an electric shock after pronouncing some word, then it does not contain the selected letter.
Output
Output a single integer โ the number of electric shocks that Valentin could have avoided if he had told the selected letter just after it became uniquely determined.
Examples
Input
5
! abc
. ad
. b
! cd
? c
Output
1
Input
8
! hello
! codeforces
? c
. o
? d
? h
. l
? e
Output
2
Input
7
! ababahalamaha
? a
? b
? a
? b
? a
? h
Output
0
Note
In the first test case after the first action it becomes clear that the selected letter is one of the following: a, b, c. After the second action we can note that the selected letter is not a. Valentin tells word "b" and doesn't get a shock. After that it is clear that the selected letter is c, but Valentin pronounces the word cd and gets an excessive electric shock.
In the second test case after the first two electric shocks we understand that the selected letter is e or o. Valentin tries some words consisting of these letters and after the second word it's clear that the selected letter is e, but Valentin makes 3 more actions before he makes a correct hypothesis.
In the third example the selected letter can be uniquely determined only when Valentin guesses it, so he didn't get excessive electric shocks.
Submitted Solution:
```
string = "abcdefghijklmnopqrstuvwxyz"
varians = list(string)
n = int(input())
for i in range(n):
v, s = input().split()
if len(varians) == 1:
print(n-i-1)
break
if v == '.':
for simb in s:
if simb in varians:
del varians[varians.index(simb)]
elif v == '!':
for simb in varians.copy():
if not simb in s:
del varians[varians.index(simb)]
else:
if s in varians:
del varians[varians.index(s)]
if i == n - 1:
print(0)
``` | instruction | 0 | 17,389 | 18 | 34,778 |
No | output | 1 | 17,389 | 18 | 34,779 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Valentin participates in a show called "Shockers". The rules are quite easy: jury selects one letter which Valentin doesn't know. He should make a small speech, but every time he pronounces a word that contains the selected letter, he receives an electric shock. He can make guesses which letter is selected, but for each incorrect guess he receives an electric shock too. The show ends when Valentin guesses the selected letter correctly.
Valentin can't keep in mind everything, so he could guess the selected letter much later than it can be uniquely determined and get excessive electric shocks. Excessive electric shocks are those which Valentin got after the moment the selected letter can be uniquely determined. You should find out the number of excessive electric shocks.
Input
The first line contains a single integer n (1 โค n โค 105) โ the number of actions Valentin did.
The next n lines contain descriptions of his actions, each line contains description of one action. Each action can be of one of three types:
1. Valentin pronounced some word and didn't get an electric shock. This action is described by the string ". w" (without quotes), in which "." is a dot (ASCII-code 46), and w is the word that Valentin said.
2. Valentin pronounced some word and got an electric shock. This action is described by the string "! w" (without quotes), in which "!" is an exclamation mark (ASCII-code 33), and w is the word that Valentin said.
3. Valentin made a guess about the selected letter. This action is described by the string "? s" (without quotes), in which "?" is a question mark (ASCII-code 63), and s is the guess โ a lowercase English letter.
All words consist only of lowercase English letters. The total length of all words does not exceed 105.
It is guaranteed that last action is a guess about the selected letter. Also, it is guaranteed that Valentin didn't make correct guesses about the selected letter before the last action. Moreover, it's guaranteed that if Valentin got an electric shock after pronouncing some word, then it contains the selected letter; and also if Valentin didn't get an electric shock after pronouncing some word, then it does not contain the selected letter.
Output
Output a single integer โ the number of electric shocks that Valentin could have avoided if he had told the selected letter just after it became uniquely determined.
Examples
Input
5
! abc
. ad
. b
! cd
? c
Output
1
Input
8
! hello
! codeforces
? c
. o
? d
? h
. l
? e
Output
2
Input
7
! ababahalamaha
? a
? b
? a
? b
? a
? h
Output
0
Note
In the first test case after the first action it becomes clear that the selected letter is one of the following: a, b, c. After the second action we can note that the selected letter is not a. Valentin tells word "b" and doesn't get a shock. After that it is clear that the selected letter is c, but Valentin pronounces the word cd and gets an excessive electric shock.
In the second test case after the first two electric shocks we understand that the selected letter is e or o. Valentin tries some words consisting of these letters and after the second word it's clear that the selected letter is e, but Valentin makes 3 more actions before he makes a correct hypothesis.
In the third example the selected letter can be uniquely determined only when Valentin guesses it, so he didn't get excessive electric shocks.
Submitted Solution:
```
n = int(input())
got = [1] * 26
f = False
ans = 26
out = 0
while n != 0:
n -= 1
c, s = input().split()
freq = [0] * 26
s = str(s)
for x in s:
freq[ord(x) - ord('a')] += 1
if c == '!':
if f == True:
out += 1
else:
for i in range(0,26):
if freq[i] == 0:
got[i] = 0
elif c == '?':
if f and (ord(s[0]) - ord('a') != ans) :
out += 1
else:
for i in range(0,26):
if freq[i] > 0:
got[i] = 0
cnt = 0
for j in got:
cnt += j
if cnt == 1:
f = True
for c in range(0, 26):
if got[c] == 1:
ans = c
print(out)
``` | instruction | 0 | 17,390 | 18 | 34,780 |
No | output | 1 | 17,390 | 18 | 34,781 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Valentin participates in a show called "Shockers". The rules are quite easy: jury selects one letter which Valentin doesn't know. He should make a small speech, but every time he pronounces a word that contains the selected letter, he receives an electric shock. He can make guesses which letter is selected, but for each incorrect guess he receives an electric shock too. The show ends when Valentin guesses the selected letter correctly.
Valentin can't keep in mind everything, so he could guess the selected letter much later than it can be uniquely determined and get excessive electric shocks. Excessive electric shocks are those which Valentin got after the moment the selected letter can be uniquely determined. You should find out the number of excessive electric shocks.
Input
The first line contains a single integer n (1 โค n โค 105) โ the number of actions Valentin did.
The next n lines contain descriptions of his actions, each line contains description of one action. Each action can be of one of three types:
1. Valentin pronounced some word and didn't get an electric shock. This action is described by the string ". w" (without quotes), in which "." is a dot (ASCII-code 46), and w is the word that Valentin said.
2. Valentin pronounced some word and got an electric shock. This action is described by the string "! w" (without quotes), in which "!" is an exclamation mark (ASCII-code 33), and w is the word that Valentin said.
3. Valentin made a guess about the selected letter. This action is described by the string "? s" (without quotes), in which "?" is a question mark (ASCII-code 63), and s is the guess โ a lowercase English letter.
All words consist only of lowercase English letters. The total length of all words does not exceed 105.
It is guaranteed that last action is a guess about the selected letter. Also, it is guaranteed that Valentin didn't make correct guesses about the selected letter before the last action. Moreover, it's guaranteed that if Valentin got an electric shock after pronouncing some word, then it contains the selected letter; and also if Valentin didn't get an electric shock after pronouncing some word, then it does not contain the selected letter.
Output
Output a single integer โ the number of electric shocks that Valentin could have avoided if he had told the selected letter just after it became uniquely determined.
Examples
Input
5
! abc
. ad
. b
! cd
? c
Output
1
Input
8
! hello
! codeforces
? c
. o
? d
? h
. l
? e
Output
2
Input
7
! ababahalamaha
? a
? b
? a
? b
? a
? h
Output
0
Note
In the first test case after the first action it becomes clear that the selected letter is one of the following: a, b, c. After the second action we can note that the selected letter is not a. Valentin tells word "b" and doesn't get a shock. After that it is clear that the selected letter is c, but Valentin pronounces the word cd and gets an excessive electric shock.
In the second test case after the first two electric shocks we understand that the selected letter is e or o. Valentin tries some words consisting of these letters and after the second word it's clear that the selected letter is e, but Valentin makes 3 more actions before he makes a correct hypothesis.
In the third example the selected letter can be uniquely determined only when Valentin guesses it, so he didn't get excessive electric shocks.
Submitted Solution:
```
n = int(input())
got = [1] * 26
f = False
ans = 26
out = 0
while n != 0:
n -= 1
c, s = input().split()
freq = [0] * 26
s = str(s)
for x in s:
freq[ord(x) - ord('a')] += 1
if c == '!':
if f == True:
out += 1
else:
fr = False
for i in range(0,26):
if freq[i] == 0:
got[i] = 0
fr = True
if fr == False:
out += 1
elif c == '?':
if (f and (ord(s[0]) - ord('a') != ans)) or got[ord(s[0]) - ord('a')] == 0 :
out += 1
else:
for i in range(0,26):
if freq[i] > 0:
got[i] = 0
cnt = 0
for j in got:
cnt += j
if cnt == 1:
f = True
for c in range(0, 26):
if got[c] == 1:
ans = c
print(out)
``` | instruction | 0 | 17,391 | 18 | 34,782 |
No | output | 1 | 17,391 | 18 | 34,783 |
Provide a correct Python 3 solution for this coding contest problem.
You are given a string S consisting of lowercase English letters. Determine whether all the characters in S are different.
Constraints
* 2 โค |S| โค 26, where |S| denotes the length of S.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
S
Output
If all the characters in S are different, print `yes` (case-sensitive); otherwise, print `no`.
Examples
Input
uncopyrightable
Output
yes
Input
different
Output
no
Input
no
Output
yes | instruction | 0 | 17,556 | 18 | 35,112 |
"Correct Solution:
```
s=input()
print("no" if len(s) != len(set(s)) else "yes")
``` | output | 1 | 17,556 | 18 | 35,113 |
Provide a correct Python 3 solution for this coding contest problem.
You are given a string S consisting of lowercase English letters. Determine whether all the characters in S are different.
Constraints
* 2 โค |S| โค 26, where |S| denotes the length of S.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
S
Output
If all the characters in S are different, print `yes` (case-sensitive); otherwise, print `no`.
Examples
Input
uncopyrightable
Output
yes
Input
different
Output
no
Input
no
Output
yes | instruction | 0 | 17,557 | 18 | 35,114 |
"Correct Solution:
```
S=input()
L=set(S)
print('yes' if len(S)==len(L) else "no")
``` | output | 1 | 17,557 | 18 | 35,115 |
Provide a correct Python 3 solution for this coding contest problem.
You are given a string S consisting of lowercase English letters. Determine whether all the characters in S are different.
Constraints
* 2 โค |S| โค 26, where |S| denotes the length of S.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
S
Output
If all the characters in S are different, print `yes` (case-sensitive); otherwise, print `no`.
Examples
Input
uncopyrightable
Output
yes
Input
different
Output
no
Input
no
Output
yes | instruction | 0 | 17,558 | 18 | 35,116 |
"Correct Solution:
```
s=list(input())
print('yes' if len(s)==len(list(set(s))) else "no")
``` | output | 1 | 17,558 | 18 | 35,117 |
Provide a correct Python 3 solution for this coding contest problem.
You are given a string S consisting of lowercase English letters. Determine whether all the characters in S are different.
Constraints
* 2 โค |S| โค 26, where |S| denotes the length of S.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
S
Output
If all the characters in S are different, print `yes` (case-sensitive); otherwise, print `no`.
Examples
Input
uncopyrightable
Output
yes
Input
different
Output
no
Input
no
Output
yes | instruction | 0 | 17,559 | 18 | 35,118 |
"Correct Solution:
```
s = input()
t = set(s)
print("yes" if len(s) == len(t) else "no")
``` | output | 1 | 17,559 | 18 | 35,119 |
Provide a correct Python 3 solution for this coding contest problem.
You are given a string S consisting of lowercase English letters. Determine whether all the characters in S are different.
Constraints
* 2 โค |S| โค 26, where |S| denotes the length of S.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
S
Output
If all the characters in S are different, print `yes` (case-sensitive); otherwise, print `no`.
Examples
Input
uncopyrightable
Output
yes
Input
different
Output
no
Input
no
Output
yes | instruction | 0 | 17,560 | 18 | 35,120 |
"Correct Solution:
```
S = input()
print("yes") if len(S) == len(set(list(S))) else print("no")
``` | output | 1 | 17,560 | 18 | 35,121 |
Provide a correct Python 3 solution for this coding contest problem.
You are given a string S consisting of lowercase English letters. Determine whether all the characters in S are different.
Constraints
* 2 โค |S| โค 26, where |S| denotes the length of S.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
S
Output
If all the characters in S are different, print `yes` (case-sensitive); otherwise, print `no`.
Examples
Input
uncopyrightable
Output
yes
Input
different
Output
no
Input
no
Output
yes | instruction | 0 | 17,561 | 18 | 35,122 |
"Correct Solution:
```
l=list(input())
s=set(l)
print("yes" if len(l)==len(s) else "no")
``` | output | 1 | 17,561 | 18 | 35,123 |
Provide a correct Python 3 solution for this coding contest problem.
You are given a string S consisting of lowercase English letters. Determine whether all the characters in S are different.
Constraints
* 2 โค |S| โค 26, where |S| denotes the length of S.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
S
Output
If all the characters in S are different, print `yes` (case-sensitive); otherwise, print `no`.
Examples
Input
uncopyrightable
Output
yes
Input
different
Output
no
Input
no
Output
yes | instruction | 0 | 17,562 | 18 | 35,124 |
"Correct Solution:
```
s = input()
x = set(s)
print('yes' if len(s) == len(x) else 'no')
``` | output | 1 | 17,562 | 18 | 35,125 |
Provide a correct Python 3 solution for this coding contest problem.
You are given a string S consisting of lowercase English letters. Determine whether all the characters in S are different.
Constraints
* 2 โค |S| โค 26, where |S| denotes the length of S.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
S
Output
If all the characters in S are different, print `yes` (case-sensitive); otherwise, print `no`.
Examples
Input
uncopyrightable
Output
yes
Input
different
Output
no
Input
no
Output
yes | instruction | 0 | 17,563 | 18 | 35,126 |
"Correct Solution:
```
s=list(input())
print('yes' if sorted(s)==sorted(set(s)) else 'no')
``` | output | 1 | 17,563 | 18 | 35,127 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a string S consisting of lowercase English letters. Determine whether all the characters in S are different.
Constraints
* 2 โค |S| โค 26, where |S| denotes the length of S.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
S
Output
If all the characters in S are different, print `yes` (case-sensitive); otherwise, print `no`.
Examples
Input
uncopyrightable
Output
yes
Input
different
Output
no
Input
no
Output
yes
Submitted Solution:
```
s=input();print('yneos'[len(s)>len(set(s))::2])
``` | instruction | 0 | 17,564 | 18 | 35,128 |
Yes | output | 1 | 17,564 | 18 | 35,129 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a string S consisting of lowercase English letters. Determine whether all the characters in S are different.
Constraints
* 2 โค |S| โค 26, where |S| denotes the length of S.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
S
Output
If all the characters in S are different, print `yes` (case-sensitive); otherwise, print `no`.
Examples
Input
uncopyrightable
Output
yes
Input
different
Output
no
Input
no
Output
yes
Submitted Solution:
```
S=input()
X="no"
if len(S)-len(set(S))==0:
X="yes"
print(X)
``` | instruction | 0 | 17,565 | 18 | 35,130 |
Yes | output | 1 | 17,565 | 18 | 35,131 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a string S consisting of lowercase English letters. Determine whether all the characters in S are different.
Constraints
* 2 โค |S| โค 26, where |S| denotes the length of S.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
S
Output
If all the characters in S are different, print `yes` (case-sensitive); otherwise, print `no`.
Examples
Input
uncopyrightable
Output
yes
Input
different
Output
no
Input
no
Output
yes
Submitted Solution:
```
S = list(input())
print('yes') if len(S) == len(set(S)) else print('no')
``` | instruction | 0 | 17,566 | 18 | 35,132 |
Yes | output | 1 | 17,566 | 18 | 35,133 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a string S consisting of lowercase English letters. Determine whether all the characters in S are different.
Constraints
* 2 โค |S| โค 26, where |S| denotes the length of S.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
S
Output
If all the characters in S are different, print `yes` (case-sensitive); otherwise, print `no`.
Examples
Input
uncopyrightable
Output
yes
Input
different
Output
no
Input
no
Output
yes
Submitted Solution:
```
S = input()
print(["yes", "no"][len(set(S)) < len(S)])
``` | instruction | 0 | 17,567 | 18 | 35,134 |
Yes | output | 1 | 17,567 | 18 | 35,135 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a string S consisting of lowercase English letters. Determine whether all the characters in S are different.
Constraints
* 2 โค |S| โค 26, where |S| denotes the length of S.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
S
Output
If all the characters in S are different, print `yes` (case-sensitive); otherwise, print `no`.
Examples
Input
uncopyrightable
Output
yes
Input
different
Output
no
Input
no
Output
yes
Submitted Solution:
```
s = input()
ns = sorted(s)
ans = 'yes'
for i in range(len(s)):
if s[i] == s[i+1]:
ans = 'no'
print(ans)
``` | instruction | 0 | 17,568 | 18 | 35,136 |
No | output | 1 | 17,568 | 18 | 35,137 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a string S consisting of lowercase English letters. Determine whether all the characters in S are different.
Constraints
* 2 โค |S| โค 26, where |S| denotes the length of S.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
S
Output
If all the characters in S are different, print `yes` (case-sensitive); otherwise, print `no`.
Examples
Input
uncopyrightable
Output
yes
Input
different
Output
no
Input
no
Output
yes
Submitted Solution:
```
n = input()
m = list(n.copy)
#print(m)
if len(set(m)) == len(m):
print("yes")
else:
print("no")
``` | instruction | 0 | 17,569 | 18 | 35,138 |
No | output | 1 | 17,569 | 18 | 35,139 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a string S consisting of lowercase English letters. Determine whether all the characters in S are different.
Constraints
* 2 โค |S| โค 26, where |S| denotes the length of S.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
S
Output
If all the characters in S are different, print `yes` (case-sensitive); otherwise, print `no`.
Examples
Input
uncopyrightable
Output
yes
Input
different
Output
no
Input
no
Output
yes
Submitted Solution:
```
s = input()
t = set(s)
print("yes" if len(s) == set(t) else "no")
``` | instruction | 0 | 17,570 | 18 | 35,140 |
No | output | 1 | 17,570 | 18 | 35,141 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a string S consisting of lowercase English letters. Determine whether all the characters in S are different.
Constraints
* 2 โค |S| โค 26, where |S| denotes the length of S.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
S
Output
If all the characters in S are different, print `yes` (case-sensitive); otherwise, print `no`.
Examples
Input
uncopyrightable
Output
yes
Input
different
Output
no
Input
no
Output
yes
Submitted Solution:
```
s = input().split('')
s.sort()
for i in range(len(s)-1):
if s[i+1] == s[i]:
print('no')
exit()
print('yes')
``` | instruction | 0 | 17,571 | 18 | 35,142 |
No | output | 1 | 17,571 | 18 | 35,143 |
Provide a correct Python 3 solution for this coding contest problem.
problem
AOR Ika wants to create a strong password that consists only of lowercase letters. AOR Ika-chan, who was given an example of $ N $ of dangerous passwords by a friend, decided to create a password that meets all of the following conditions.
1. The length is at least one character.
2. Different from any contiguous substring of any dangerous password.
3. This is the shortest character string that meets the conditions 1 and 2.
4. This is the character string that comes to the beginning when arranged in lexicographic order while satisfying the conditions 1, 2, and 3.
Write a program to generate a strong password on behalf of AOR Ika-chan.
input
Input is given from standard input in the following format.
$ N $
$ S_1 $
$ \ vdots $
$ S_N $
* The first line is given the integer $ N $, which represents the number of strings.
* The string $ S_i $ is given to the $ N $ line from the second line.
* $ | S_i | $ is the length of the string, which is one or more characters.
* Satisfy $ 1 \ le N \ le 100,000 $.
* $ 1 \ le \ sum_ {1 \ le i \ le N} | S_i | \ le 400,000 $.
* The string contains only lowercase letters.
output
Print the answer in one line. Also, output a line break at the end.
Example
Input
5
password
login
admin
root
master
Output
b | instruction | 0 | 17,647 | 18 | 35,294 |
"Correct Solution:
```
import math,string,itertools,fractions,heapq,collections,re,array,bisect,sys,random,time
sys.setrecursionlimit(10**7)
inf = 10**20
mod = 10**9 + 7
def LI(): return list(map(int, input().split()))
def LF(): return list(map(float, input().split()))
def LS(): return input().split()
def I(): return int(input())
def F(): return float(input())
def S(): return input()
def main():
n = I()
a = [S() for _ in range(n)]
def sn(s):
r = 0
for i in range(len(s)):
c = ord(s[i]) - 96
r = r*27+c
return r
def ns(n):
r = ''
while n > 0:
r = chr(n%27+96) + r
n //= 27
return r
for i in range(1,6):
ss = set()
for s in a:
sl = len(s)
for j in range(sl-i+1):
ss.add(sn(s[j:j+i]))
if len(ss) >= 26**i:
continue
for ia in itertools.product(range(1,27), repeat=i):
t = 0
for ti in ia:
t = t*27+ti
if t not in ss:
return ns(t)
return ''
print(main())
``` | output | 1 | 17,647 | 18 | 35,295 |
Provide a correct Python 3 solution for this coding contest problem.
problem
AOR Ika wants to create a strong password that consists only of lowercase letters. AOR Ika-chan, who was given an example of $ N $ of dangerous passwords by a friend, decided to create a password that meets all of the following conditions.
1. The length is at least one character.
2. Different from any contiguous substring of any dangerous password.
3. This is the shortest character string that meets the conditions 1 and 2.
4. This is the character string that comes to the beginning when arranged in lexicographic order while satisfying the conditions 1, 2, and 3.
Write a program to generate a strong password on behalf of AOR Ika-chan.
input
Input is given from standard input in the following format.
$ N $
$ S_1 $
$ \ vdots $
$ S_N $
* The first line is given the integer $ N $, which represents the number of strings.
* The string $ S_i $ is given to the $ N $ line from the second line.
* $ | S_i | $ is the length of the string, which is one or more characters.
* Satisfy $ 1 \ le N \ le 100,000 $.
* $ 1 \ le \ sum_ {1 \ le i \ le N} | S_i | \ le 400,000 $.
* The string contains only lowercase letters.
output
Print the answer in one line. Also, output a line break at the end.
Example
Input
5
password
login
admin
root
master
Output
b | instruction | 0 | 17,648 | 18 | 35,296 |
"Correct Solution:
```
N = int(input())
S = []
for _ in range(N):
s = input()
S.append(s)
class RollingHash:
def __init__(self, s, base=1007, mod=10**9+7):
self.s = s
self.length = length = len(s)
self.base = base
self.mod = mod
self.h = h = [0] * (length + 1)
for i in range(length):
h[i + 1] = (h[i] * base + ord(s[i])) % mod
self.p = p = [1] * (length + 1)
for i in range(length):
p[i + 1] = pow(base, i + 1, mod)
def get(self, l, r):
mod = self.mod
return ((self.h[r] - self.h[l] * self.p[r - l]) + mod) % mod
H = [RollingHash(s) for s in S]
abcd = [chr(97+i) for i in range(26)]
sub_strs = ['']
#print(abcd)
l = 1
while 1:
sub_set = set()
for h in H:
for i in range(len(h.s)-(l-1)):
sub_set.add(h.get(i,i+l))
tmp = []
for s1 in sub_strs:
for s2 in abcd:
tmp.append(s1+s2)
sub_strs = tmp[:]
flag = False
for s in sub_strs:
h = RollingHash(s).get(0,len(s))
if h in sub_set:
continue
else:
flag = s
break
if flag:
print(s)
break
l += 1
``` | output | 1 | 17,648 | 18 | 35,297 |
Provide a correct Python 3 solution for this coding contest problem.
problem
AOR Ika wants to create a strong password that consists only of lowercase letters. AOR Ika-chan, who was given an example of $ N $ of dangerous passwords by a friend, decided to create a password that meets all of the following conditions.
1. The length is at least one character.
2. Different from any contiguous substring of any dangerous password.
3. This is the shortest character string that meets the conditions 1 and 2.
4. This is the character string that comes to the beginning when arranged in lexicographic order while satisfying the conditions 1, 2, and 3.
Write a program to generate a strong password on behalf of AOR Ika-chan.
input
Input is given from standard input in the following format.
$ N $
$ S_1 $
$ \ vdots $
$ S_N $
* The first line is given the integer $ N $, which represents the number of strings.
* The string $ S_i $ is given to the $ N $ line from the second line.
* $ | S_i | $ is the length of the string, which is one or more characters.
* Satisfy $ 1 \ le N \ le 100,000 $.
* $ 1 \ le \ sum_ {1 \ le i \ le N} | S_i | \ le 400,000 $.
* The string contains only lowercase letters.
output
Print the answer in one line. Also, output a line break at the end.
Example
Input
5
password
login
admin
root
master
Output
b | instruction | 0 | 17,649 | 18 | 35,298 |
"Correct Solution:
```
def make_alphabet(now_alphabet, alphabet):
next_alphabet = []
for n_al in now_alphabet:
for al in alphabet:
next_alphabet.append(n_al+al)
return next_alphabet
a = int(input())
b = []
for a in range(a):
b.append(input())
alphabet = [chr(ch) for ch in range(97,123)]
now_alphabet = alphabet
count=0
flag=0
while flag==0:
letter = []
for word in b:
for i in range(len(word)-count):
letter.append(word[i:i+1+count])
rem = list(set(now_alphabet) - set(letter))
if rem!=[]:
print(sorted(rem)[0])
flag=1
count+=1
now_alphabet = make_alphabet(now_alphabet, alphabet)
``` | output | 1 | 17,649 | 18 | 35,299 |
Provide a correct Python 3 solution for this coding contest problem.
problem
AOR Ika wants to create a strong password that consists only of lowercase letters. AOR Ika-chan, who was given an example of $ N $ of dangerous passwords by a friend, decided to create a password that meets all of the following conditions.
1. The length is at least one character.
2. Different from any contiguous substring of any dangerous password.
3. This is the shortest character string that meets the conditions 1 and 2.
4. This is the character string that comes to the beginning when arranged in lexicographic order while satisfying the conditions 1, 2, and 3.
Write a program to generate a strong password on behalf of AOR Ika-chan.
input
Input is given from standard input in the following format.
$ N $
$ S_1 $
$ \ vdots $
$ S_N $
* The first line is given the integer $ N $, which represents the number of strings.
* The string $ S_i $ is given to the $ N $ line from the second line.
* $ | S_i | $ is the length of the string, which is one or more characters.
* Satisfy $ 1 \ le N \ le 100,000 $.
* $ 1 \ le \ sum_ {1 \ le i \ le N} | S_i | \ le 400,000 $.
* The string contains only lowercase letters.
output
Print the answer in one line. Also, output a line break at the end.
Example
Input
5
password
login
admin
root
master
Output
b | instruction | 0 | 17,650 | 18 | 35,300 |
"Correct Solution:
```
# coding:utf-8
# AOJ 2808 RUPC 2017 Password
import itertools
INF = float('inf')
MOD = 10 ** 9 + 7
def inpl(): return list(map(int, input().split()))
class RollingHash:
def __init__(self, s, base, mod):
self.s = s
self.length = length = len(s)
self.base = base
self.mod = mod
self.h = h = [0] * (length + 1)
for i in range(length):
h[i + 1] = (h[i] * base + ord(s[i])) % mod
self.p = p = [1] * (length + 1)
for i in range(length):
p[i + 1] = pow(base, i + 1, mod)
def get(self, l, r):
mod = self.mod
return ((self.h[r] - self.h[l] * self.p[r - l]) + mod) % mod
def solve():
N = int(input())
hash_list = []
for _ in range(N):
s = input()
h1 = RollingHash(s, 103, MOD)
hash_list.append((len(s), h1))
ss = 'abcdefghijklmnopqrstuvwxyz'
hash_set = set()
for i in range(4 * 10 ** 5):
for length, h1 in hash_list:
for l in range(length - i):
v1 = h1.get(l, l + i + 1)
if v1 not in hash_set:
hash_set.add(v1)
for s in itertools.product(ss, repeat=i + 1):
v1 = RollingHash(s, 103, MOD).get(0, len(s))
if v1 not in hash_set:
return ''.join(s)
return -1
print(solve())
``` | output | 1 | 17,650 | 18 | 35,301 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
problem
AOR Ika wants to create a strong password that consists only of lowercase letters. AOR Ika-chan, who was given an example of $ N $ of dangerous passwords by a friend, decided to create a password that meets all of the following conditions.
1. The length is at least one character.
2. Different from any contiguous substring of any dangerous password.
3. This is the shortest character string that meets the conditions 1 and 2.
4. This is the character string that comes to the beginning when arranged in lexicographic order while satisfying the conditions 1, 2, and 3.
Write a program to generate a strong password on behalf of AOR Ika-chan.
input
Input is given from standard input in the following format.
$ N $
$ S_1 $
$ \ vdots $
$ S_N $
* The first line is given the integer $ N $, which represents the number of strings.
* The string $ S_i $ is given to the $ N $ line from the second line.
* $ | S_i | $ is the length of the string, which is one or more characters.
* Satisfy $ 1 \ le N \ le 100,000 $.
* $ 1 \ le \ sum_ {1 \ le i \ le N} | S_i | \ le 400,000 $.
* The string contains only lowercase letters.
output
Print the answer in one line. Also, output a line break at the end.
Example
Input
5
password
login
admin
root
master
Output
b
Submitted Solution:
```
[
print(x) + exit()
for itertools in [__import__("itertools")]
for S in [[input() for _ in range(int(input()))]]
for n in range(max([len(s) for s in S]))
for x in ["".join(X) for X in itertools.combinations_with_replacement("abcdefghijklmnopqrstuvwxyz", n + 1)]
if x not in set([s[i:i+n+1] for s in S for i in range(len(s))])
]
``` | instruction | 0 | 17,651 | 18 | 35,302 |
No | output | 1 | 17,651 | 18 | 35,303 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
problem
AOR Ika wants to create a strong password that consists only of lowercase letters. AOR Ika-chan, who was given an example of $ N $ of dangerous passwords by a friend, decided to create a password that meets all of the following conditions.
1. The length is at least one character.
2. Different from any contiguous substring of any dangerous password.
3. This is the shortest character string that meets the conditions 1 and 2.
4. This is the character string that comes to the beginning when arranged in lexicographic order while satisfying the conditions 1, 2, and 3.
Write a program to generate a strong password on behalf of AOR Ika-chan.
input
Input is given from standard input in the following format.
$ N $
$ S_1 $
$ \ vdots $
$ S_N $
* The first line is given the integer $ N $, which represents the number of strings.
* The string $ S_i $ is given to the $ N $ line from the second line.
* $ | S_i | $ is the length of the string, which is one or more characters.
* Satisfy $ 1 \ le N \ le 100,000 $.
* $ 1 \ le \ sum_ {1 \ le i \ le N} | S_i | \ le 400,000 $.
* The string contains only lowercase letters.
output
Print the answer in one line. Also, output a line break at the end.
Example
Input
5
password
login
admin
root
master
Output
b
Submitted Solution:
```
[
print("".join(x)) and exit()
for S in [[input() for _ in range(int(input()))]]
for n in range(max([len(s) for s in S]))
for x in __import__("itertools").combinations_with_replacement("abcdefghijklmnopqrstuvwxyz", n + 1)
if "".join(x) not in set([s[i:i+n+1] for s in S for i in range(len(s))])
]
``` | instruction | 0 | 17,652 | 18 | 35,304 |
No | output | 1 | 17,652 | 18 | 35,305 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
problem
AOR Ika wants to create a strong password that consists only of lowercase letters. AOR Ika-chan, who was given an example of $ N $ of dangerous passwords by a friend, decided to create a password that meets all of the following conditions.
1. The length is at least one character.
2. Different from any contiguous substring of any dangerous password.
3. This is the shortest character string that meets the conditions 1 and 2.
4. This is the character string that comes to the beginning when arranged in lexicographic order while satisfying the conditions 1, 2, and 3.
Write a program to generate a strong password on behalf of AOR Ika-chan.
input
Input is given from standard input in the following format.
$ N $
$ S_1 $
$ \ vdots $
$ S_N $
* The first line is given the integer $ N $, which represents the number of strings.
* The string $ S_i $ is given to the $ N $ line from the second line.
* $ | S_i | $ is the length of the string, which is one or more characters.
* Satisfy $ 1 \ le N \ le 100,000 $.
* $ 1 \ le \ sum_ {1 \ le i \ le N} | S_i | \ le 400,000 $.
* The string contains only lowercase letters.
output
Print the answer in one line. Also, output a line break at the end.
Example
Input
5
password
login
admin
root
master
Output
b
Submitted Solution:
```
n = int(input())
s = ''
alf = ['.']
for i in range(ord('a'), ord('z')+1):
alf.append(chr(i))
for i in range(n):
s += input() + ' '
for a in alf:
for b in alf:
for c in alf:
for d in alf:
t = (a + b + c + d).replace('.', '')
if t not in s:
print(t)
quit()
``` | instruction | 0 | 17,653 | 18 | 35,306 |
No | output | 1 | 17,653 | 18 | 35,307 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
problem
AOR Ika wants to create a strong password that consists only of lowercase letters. AOR Ika-chan, who was given an example of $ N $ of dangerous passwords by a friend, decided to create a password that meets all of the following conditions.
1. The length is at least one character.
2. Different from any contiguous substring of any dangerous password.
3. This is the shortest character string that meets the conditions 1 and 2.
4. This is the character string that comes to the beginning when arranged in lexicographic order while satisfying the conditions 1, 2, and 3.
Write a program to generate a strong password on behalf of AOR Ika-chan.
input
Input is given from standard input in the following format.
$ N $
$ S_1 $
$ \ vdots $
$ S_N $
* The first line is given the integer $ N $, which represents the number of strings.
* The string $ S_i $ is given to the $ N $ line from the second line.
* $ | S_i | $ is the length of the string, which is one or more characters.
* Satisfy $ 1 \ le N \ le 100,000 $.
* $ 1 \ le \ sum_ {1 \ le i \ le N} | S_i | \ le 400,000 $.
* The string contains only lowercase letters.
output
Print the answer in one line. Also, output a line break at the end.
Example
Input
5
password
login
admin
root
master
Output
b
Submitted Solution:
```
import math,string,itertools,fractions,heapq,collections,re,array,bisect,sys,random,time
sys.setrecursionlimit(10**7)
inf = 10**20
mod = 10**9 + 7
def LI(): return list(map(int, input().split()))
def LF(): return list(map(float, input().split()))
def LS(): return input().split()
def I(): return int(input())
def F(): return float(input())
def S(): return input()
def main():
n = I()
a = [S() for _ in range(n)]
def sn(s):
r = 0
for i in range(len(s)):
c = ord(s[i]) - 96
r = r*27+c
return r
def ns(n):
r = ''
while n > 0:
r = chr(n%27+96) + r
n //= 27
return r
for i in range(1,5):
ss = set()
for s in a:
sl = len(s)
for j in range(sl-i+1):
ss.add(sn(s[j:j+i]))
if len(ss) >= 26**i:
continue
for ia in itertools.combinations_with_replacement(range(1,27), i):
t = 0
for ti in ia:
t = t*27+ti
if t not in ss:
return ns(t)
return ''
print(main())
``` | instruction | 0 | 17,654 | 18 | 35,308 |
No | output | 1 | 17,654 | 18 | 35,309 |
Provide a correct Python 3 solution for this coding contest problem.
You are given a string S of length 2N consisting of lowercase English letters.
There are 2^{2N} ways to color each character in S red or blue. Among these ways, how many satisfy the following condition?
* The string obtained by reading the characters painted red from left to right is equal to the string obtained by reading the characters painted blue from right to left.
Constraints
* 1 \leq N \leq 18
* The length of S is 2N.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
N
S
Output
Print the number of ways to paint the string that satisfy the condition.
Examples
Input
4
cabaacba
Output
4
Input
11
mippiisssisssiipsspiim
Output
504
Input
4
abcdefgh
Output
0
Input
18
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Output
9075135300 | instruction | 0 | 19,202 | 18 | 38,404 |
"Correct Solution:
```
from collections import deque
def comb(s):
p = deque([('','')])
for i in range(len(s)):
for j in range(2**i):
e = p.pop()
p.appendleft((e[0]+s[i],e[1]))
p.appendleft((e[0],e[1]+s[i]))
return p
n = int(input())
s = input()
sl = s[0:n]
sr = s[n:2*n][::-1]
keys1 = [c[0]+'-'+c[1] for c in comb(sl)]
keys2 = [c[0]+'-'+c[1] for c in comb(sr)]
dict = {}
for key1 in keys1:
if key1 in dict:
dict[key1] += 1
else:
dict[key1] = 1
cnt = 0
for key2 in keys2:
if key2 in dict:
cnt += dict[key2]
print(cnt)
``` | output | 1 | 19,202 | 18 | 38,405 |
Provide a correct Python 3 solution for this coding contest problem.
You are given a string S of length 2N consisting of lowercase English letters.
There are 2^{2N} ways to color each character in S red or blue. Among these ways, how many satisfy the following condition?
* The string obtained by reading the characters painted red from left to right is equal to the string obtained by reading the characters painted blue from right to left.
Constraints
* 1 \leq N \leq 18
* The length of S is 2N.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
N
S
Output
Print the number of ways to paint the string that satisfy the condition.
Examples
Input
4
cabaacba
Output
4
Input
11
mippiisssisssiipsspiim
Output
504
Input
4
abcdefgh
Output
0
Input
18
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Output
9075135300 | instruction | 0 | 19,203 | 18 | 38,406 |
"Correct Solution:
```
from collections import defaultdict
N = int(input())
S = input()
S1 = S[:N]
S2 = S[::-1][:N]
def get_s(s, i):
s1 = s2 = ''
for j in range(N):
if i>>j & 1:
s1 += s[j]
else:
s2 += s[j]
return (s1, s2)
d1 = defaultdict(int)
d2 = defaultdict(int)
for i in range(2**N):
s1 = get_s(S1, i)
d1[s1] += 1
s2 = get_s(S2, i)
d2[s2] += 1
ans = 0
for k in d1:
ans += d1[k] * d2[k]
print(ans)
``` | output | 1 | 19,203 | 18 | 38,407 |
Provide a correct Python 3 solution for this coding contest problem.
You are given a string S of length 2N consisting of lowercase English letters.
There are 2^{2N} ways to color each character in S red or blue. Among these ways, how many satisfy the following condition?
* The string obtained by reading the characters painted red from left to right is equal to the string obtained by reading the characters painted blue from right to left.
Constraints
* 1 \leq N \leq 18
* The length of S is 2N.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
N
S
Output
Print the number of ways to paint the string that satisfy the condition.
Examples
Input
4
cabaacba
Output
4
Input
11
mippiisssisssiipsspiim
Output
504
Input
4
abcdefgh
Output
0
Input
18
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Output
9075135300 | instruction | 0 | 19,204 | 18 | 38,408 |
"Correct Solution:
```
from collections import defaultdict
N = int(input())
S = input()
left = S[:N]
right = S[:N-1:-1]
# leftใฎ(blue, red)ใฎใใฟใผใณใๅ
จๅๆ
br_pattern = defaultdict(int)
for bit in range(1<<N):
blue = ""
red = ""
for isb in range(N):
if bit & (1<<isb):
blue = blue + left[isb]
else:
red = red + left[isb]
br_pattern[(blue, red)] += 1
# rightใฎ(red, blue)ใฎใใฟใผใณใใฒใจใคใใค่ชฟในใbr_patternใซไธ่ดใใๆฐใ ใansใซ่ถณใ
ans = 0
for bit in range(1<<N):
red = ""
blue = ""
for isr in range(N):
if bit & (1<<isr):
red = red + right[isr]
else:
blue = blue + right[isr]
ans += br_pattern[(red, blue)]
print(ans)
``` | output | 1 | 19,204 | 18 | 38,409 |
Provide a correct Python 3 solution for this coding contest problem.
You are given a string S of length 2N consisting of lowercase English letters.
There are 2^{2N} ways to color each character in S red or blue. Among these ways, how many satisfy the following condition?
* The string obtained by reading the characters painted red from left to right is equal to the string obtained by reading the characters painted blue from right to left.
Constraints
* 1 \leq N \leq 18
* The length of S is 2N.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
N
S
Output
Print the number of ways to paint the string that satisfy the condition.
Examples
Input
4
cabaacba
Output
4
Input
11
mippiisssisssiipsspiim
Output
504
Input
4
abcdefgh
Output
0
Input
18
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Output
9075135300 | instruction | 0 | 19,205 | 18 | 38,410 |
"Correct Solution:
```
N=int(input())
S=input()
ans=0
first={}
last={}
def dfs(r,b,num):
if num==N:
if (r,b) not in first:
first[(r,b)]=0
first[(r,b)]+=1
return 0
if len(r)<N:
dfs(r+S[num],b,num+1)
if len(b)<N:
dfs(r,S[num]+b,num+1)
dfs("","",0)
def dfs2(r,b,num):
if num==2*N:
if (r,b) not in last:
last[(r,b)]=0
last[(r,b)]+=1
return 0
if len(r)<N:
dfs2(r+S[num],b,num+1)
if len(b)<N:
dfs2(r,S[num]+b,num+1)
dfs2("","",N)
for r,b in first:
if (b,r) in last:
ans+=first[(r,b)]*last[(b,r)]
print(ans)
``` | output | 1 | 19,205 | 18 | 38,411 |
Provide a correct Python 3 solution for this coding contest problem.
You are given a string S of length 2N consisting of lowercase English letters.
There are 2^{2N} ways to color each character in S red or blue. Among these ways, how many satisfy the following condition?
* The string obtained by reading the characters painted red from left to right is equal to the string obtained by reading the characters painted blue from right to left.
Constraints
* 1 \leq N \leq 18
* The length of S is 2N.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
N
S
Output
Print the number of ways to paint the string that satisfy the condition.
Examples
Input
4
cabaacba
Output
4
Input
11
mippiisssisssiipsspiim
Output
504
Input
4
abcdefgh
Output
0
Input
18
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Output
9075135300 | instruction | 0 | 19,206 | 18 | 38,412 |
"Correct Solution:
```
from itertools import product, compress
from collections import Counter
N = int(input())
Ss = input()
S1s = Ss[:N]
ptn1s = [''.join(compress(S1s, sels)) for sels in product(range(2), repeat=N)]
cnt1 = Counter([(red, blue) for red, blue in zip(ptn1s, reversed(ptn1s))])
S2s = Ss[N:][::-1]
ptn2s = [''.join(compress(S2s, sels)) for sels in product(range(2), repeat=N)]
cnt2 = Counter([(red, blue) for red, blue in zip(ptn2s, reversed(ptn2s))])
ans = 0
for ptn1, num1 in cnt1.items():
ans += num1 * cnt2[ptn1]
print(ans)
``` | output | 1 | 19,206 | 18 | 38,413 |
Provide a correct Python 3 solution for this coding contest problem.
You are given a string S of length 2N consisting of lowercase English letters.
There are 2^{2N} ways to color each character in S red or blue. Among these ways, how many satisfy the following condition?
* The string obtained by reading the characters painted red from left to right is equal to the string obtained by reading the characters painted blue from right to left.
Constraints
* 1 \leq N \leq 18
* The length of S is 2N.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
N
S
Output
Print the number of ways to paint the string that satisfy the condition.
Examples
Input
4
cabaacba
Output
4
Input
11
mippiisssisssiipsspiim
Output
504
Input
4
abcdefgh
Output
0
Input
18
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Output
9075135300 | instruction | 0 | 19,207 | 18 | 38,414 |
"Correct Solution:
```
from itertools import product
from collections import defaultdict
def solve(S):
def helper(s):
n = len(s)
d = defaultdict(int)
for p in product((True,False),repeat=n):
t = [-1]*(n+1)
t[-1] = sum(p)
i = 0
j = n-1
for c,f in zip(s,p):
if f:
t[i] = c
i += 1
else:
t[j] = c
j -= 1
d[tuple(t)] += 1
return d
S = [ord(c)-ord('a') for c in S]
n = len(S)//2
d1 = helper(S[:n])
d2 = helper(S[:n-1:-1])
res = 0
for k,c in d1.items():
res += c*d2[k]
return res
if __name__ == '__main__':
N = int(input())
S = input()
print(solve(S))
``` | output | 1 | 19,207 | 18 | 38,415 |
Provide a correct Python 3 solution for this coding contest problem.
You are given a string S of length 2N consisting of lowercase English letters.
There are 2^{2N} ways to color each character in S red or blue. Among these ways, how many satisfy the following condition?
* The string obtained by reading the characters painted red from left to right is equal to the string obtained by reading the characters painted blue from right to left.
Constraints
* 1 \leq N \leq 18
* The length of S is 2N.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
N
S
Output
Print the number of ways to paint the string that satisfy the condition.
Examples
Input
4
cabaacba
Output
4
Input
11
mippiisssisssiipsspiim
Output
504
Input
4
abcdefgh
Output
0
Input
18
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Output
9075135300 | instruction | 0 | 19,208 | 18 | 38,416 |
"Correct Solution:
```
def main():
from collections import defaultdict
N = int(input())
S = str(input())
dic = defaultdict(int)
for i in range(2 ** N):
a = str()
b = str()
for j in range(N):
if (i >> j) & 1:
a += S[j + N]
else:
b += S[j + N]
dic[(a, b)] += 1
count = 0
for i in range(2 ** N):
a = str()
b = str()
for j in range(N):
if (i >> j) & 1:
a += S[j]
else:
b += S[j]
count += dic[b[::-1], a[::-1]]
print (count)
if __name__ == '__main__':
main()
``` | output | 1 | 19,208 | 18 | 38,417 |
Provide a correct Python 3 solution for this coding contest problem.
You are given a string S of length 2N consisting of lowercase English letters.
There are 2^{2N} ways to color each character in S red or blue. Among these ways, how many satisfy the following condition?
* The string obtained by reading the characters painted red from left to right is equal to the string obtained by reading the characters painted blue from right to left.
Constraints
* 1 \leq N \leq 18
* The length of S is 2N.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
N
S
Output
Print the number of ways to paint the string that satisfy the condition.
Examples
Input
4
cabaacba
Output
4
Input
11
mippiisssisssiipsspiim
Output
504
Input
4
abcdefgh
Output
0
Input
18
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Output
9075135300 | instruction | 0 | 19,209 | 18 | 38,418 |
"Correct Solution:
```
def run(n, s):
'''
ๆๅญๅsใๅๅใซๅใใฆใๅณๅๅใ้้ ใซไธฆใณๆฟใใ
ใใใซ่ฒใฎๅกๅใใ้ใซใใใจใๅทฆๅๅใจๅณๅๅใฏ
ๅใใซใชใ
'''
sl = s[0:n]
sr = s[n:2*n][::-1]
keys1 = [c[0]+'-'+c[1] for c in comb(sl)]
keys2 = [c[0]+'-'+c[1] for c in comb(sr)]
dict = {}
for key1 in keys1:
if key1 in dict:
dict[key1] += 1
else:
dict[key1] = 1
cnt = 0
for key2 in keys2:
if key2 in dict:
cnt += dict[key2]
return cnt
def comb(s):
if len(s) == 1:
return [(s, ''), ('', s)]
else:
ret = []
for c in comb(s[0:len(s)-1]):
ret.append((c[0]+s[-1], c[1]))
ret.append((c[0], c[1]+s[-1]))
return ret
def read_line():
n = int(input())
s = input()
return (n, s)
def main():
n, s = read_line()
print(run(n, s))
if __name__ == '__main__':
main()
``` | output | 1 | 19,209 | 18 | 38,419 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a string S of length 2N consisting of lowercase English letters.
There are 2^{2N} ways to color each character in S red or blue. Among these ways, how many satisfy the following condition?
* The string obtained by reading the characters painted red from left to right is equal to the string obtained by reading the characters painted blue from right to left.
Constraints
* 1 \leq N \leq 18
* The length of S is 2N.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
N
S
Output
Print the number of ways to paint the string that satisfy the condition.
Examples
Input
4
cabaacba
Output
4
Input
11
mippiisssisssiipsspiim
Output
504
Input
4
abcdefgh
Output
0
Input
18
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Output
9075135300
Submitted Solution:
```
import math,string,itertools,fractions,heapq,collections,re,array,bisect,sys,random,time,copy,functools
sys.setrecursionlimit(10**7)
inf = 10**20
eps = 1.0 / 10**10
mod = 10**9+7
dd = [(-1,0),(0,1),(1,0),(0,-1)]
ddn = [(-1,0),(-1,1),(0,1),(1,1),(1,0),(1,-1),(0,-1),(-1,-1)]
def LI(): return [int(x) for x in sys.stdin.readline().split()]
def LI_(): return [int(x)-1 for x in sys.stdin.readline().split()]
def LF(): return [float(x) for x in sys.stdin.readline().split()]
def LS(): return sys.stdin.readline().split()
def I(): return int(sys.stdin.readline())
def F(): return float(sys.stdin.readline())
def S(): return input()
def pf(s): return print(s, flush=True)
def main():
n = I()
s = S()
s1 = s[:n]
s2 = s[n:][::-1]
d1 = collections.defaultdict(int)
d2 = collections.defaultdict(int)
for i in range(2**n):
t = t2 = ','
for j in range(n):
if 2**j & i:
t += s1[j]
else:
t2 += s1[j]
d1[t+t2] += 1
for i in range(2**n):
t = t2 = ','
for j in range(n):
if 2**j & i:
t += s2[j]
else:
t2 += s2[j]
d2[t+t2] += 1
r = 0
for k in d2.keys():
r += d1[k] * d2[k]
return r
print(main())
``` | instruction | 0 | 19,210 | 18 | 38,420 |
Yes | output | 1 | 19,210 | 18 | 38,421 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a string S of length 2N consisting of lowercase English letters.
There are 2^{2N} ways to color each character in S red or blue. Among these ways, how many satisfy the following condition?
* The string obtained by reading the characters painted red from left to right is equal to the string obtained by reading the characters painted blue from right to left.
Constraints
* 1 \leq N \leq 18
* The length of S is 2N.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
N
S
Output
Print the number of ways to paint the string that satisfy the condition.
Examples
Input
4
cabaacba
Output
4
Input
11
mippiisssisssiipsspiim
Output
504
Input
4
abcdefgh
Output
0
Input
18
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Output
9075135300
Submitted Solution:
```
n=int(input())
s=list(input())
l=[s[i] for i in range(n)]
r=[s[i] for i in range(n,2*n)]
r=r[::-1]
from collections import defaultdict
ld=defaultdict(int)
rd=defaultdict(int)
for i in range(2**n):
ls=['', '']
rs=['', '']
for j in range(n):
if (i>>j)%2==0:
ls[0]+=l[j]
rs[0]+=r[j]
elif (i>>j)%2==1:
ls[1]+=l[j]
rs[1]+=r[j]
ls=tuple(ls)
rs=tuple(rs)
ld[ls]+=1
rd[rs]+=1
cnt=0
for k in ld.keys():
a=ld[k]
b=rd[k]
cnt+=a*b
print(cnt)
``` | instruction | 0 | 19,211 | 18 | 38,422 |
Yes | output | 1 | 19,211 | 18 | 38,423 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a string S of length 2N consisting of lowercase English letters.
There are 2^{2N} ways to color each character in S red or blue. Among these ways, how many satisfy the following condition?
* The string obtained by reading the characters painted red from left to right is equal to the string obtained by reading the characters painted blue from right to left.
Constraints
* 1 \leq N \leq 18
* The length of S is 2N.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
N
S
Output
Print the number of ways to paint the string that satisfy the condition.
Examples
Input
4
cabaacba
Output
4
Input
11
mippiisssisssiipsspiim
Output
504
Input
4
abcdefgh
Output
0
Input
18
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Output
9075135300
Submitted Solution:
```
def i1():
return int(input())
def i2():
return [int(i) for i in input().split()]
n=i1()
s=input()
from collections import defaultdict
ad1 = defaultdict(int)
ad2 = defaultdict(int)
for i in range(1<<n):
a=""
b=""
for j in range(n):
if i & (1<<j) ==0:
a+=s[j]
else:
b+=s[j]
ad1[a+"_"+b[::-1]]+=1
a=""
b=""
for j in range(n):
if i & (1<<j):
a+=s[j+n]
else:
b+=s[j+n]
ad2[b[::-1]+"_"+a]+=1
cc=0
for i in ad1.keys():
cc+=ad1[i]*ad2[i]
print(cc)
``` | instruction | 0 | 19,212 | 18 | 38,424 |
Yes | output | 1 | 19,212 | 18 | 38,425 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a string S of length 2N consisting of lowercase English letters.
There are 2^{2N} ways to color each character in S red or blue. Among these ways, how many satisfy the following condition?
* The string obtained by reading the characters painted red from left to right is equal to the string obtained by reading the characters painted blue from right to left.
Constraints
* 1 \leq N \leq 18
* The length of S is 2N.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
N
S
Output
Print the number of ways to paint the string that satisfy the condition.
Examples
Input
4
cabaacba
Output
4
Input
11
mippiisssisssiipsspiim
Output
504
Input
4
abcdefgh
Output
0
Input
18
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Output
9075135300
Submitted Solution:
```
from collections import Counter
N = int(input())
S = input()
S1 = S[:N]
S2 = S[N:]
S2 = S2[::-1]
rb1 = Counter()
rb2 = Counter()
for i in range(2 ** N):
flag = bin(i)[2:].zfill(N)
r1 = ''
b1 = ''
r2 = ''
b2 = ''
for j in range(N):
if flag[j] == '0':
r1 += S1[j]
r2 += S2[j]
else:
b1 = S1[j] + b1
b2 = S2[j] + b2
key1 = r1 + '&' + b1
key2 =r2 + '&' + b2
rb1[key1] += 1
rb2[key2] += 1
ans = 0
for key in rb1.keys():
ans += rb1[key] * rb2[key]
print(ans)
``` | instruction | 0 | 19,213 | 18 | 38,426 |
Yes | output | 1 | 19,213 | 18 | 38,427 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a string S of length 2N consisting of lowercase English letters.
There are 2^{2N} ways to color each character in S red or blue. Among these ways, how many satisfy the following condition?
* The string obtained by reading the characters painted red from left to right is equal to the string obtained by reading the characters painted blue from right to left.
Constraints
* 1 \leq N \leq 18
* The length of S is 2N.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
N
S
Output
Print the number of ways to paint the string that satisfy the condition.
Examples
Input
4
cabaacba
Output
4
Input
11
mippiisssisssiipsspiim
Output
504
Input
4
abcdefgh
Output
0
Input
18
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Output
9075135300
Submitted Solution:
```
from collections import defaultdict
N = int(input())
S = input()
S1 = S[:N]
S2 = S[N:][::-1]
D = defaultdict(int)
ans = 0
for i in range(2**N):
bit = bin(2**N+i)[3:]
red1 = tuple([d for d, s in zip(S1, bit) if s == "1"])
blue1 = tuple([d for d, s in zip(S1, bit) if s == "0"])
D[(red1, blue1)] += 1
for i in range(2 ** N):
bit = bin(2 ** N + i)[3:]
red2 = tuple([d for d, s in zip(S2, bit) if s == "1"])
blue2 = tuple([d for d, s in zip(S2, bit) if s == "0"])
ans += D[(blue2, red2)]
print(ans)
``` | instruction | 0 | 19,214 | 18 | 38,428 |
No | output | 1 | 19,214 | 18 | 38,429 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a string S of length 2N consisting of lowercase English letters.
There are 2^{2N} ways to color each character in S red or blue. Among these ways, how many satisfy the following condition?
* The string obtained by reading the characters painted red from left to right is equal to the string obtained by reading the characters painted blue from right to left.
Constraints
* 1 \leq N \leq 18
* The length of S is 2N.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
N
S
Output
Print the number of ways to paint the string that satisfy the condition.
Examples
Input
4
cabaacba
Output
4
Input
11
mippiisssisssiipsspiim
Output
504
Input
4
abcdefgh
Output
0
Input
18
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Output
9075135300
Submitted Solution:
```
def run(n, s):
'''
ๆๅญๅsใๅๅใซๅใใฆใๅณๅๅใ้้ ใซไธฆใณๆฟใใ
ใใใซ่ฒใฎๅกๅใใ้ใซใใใจใๅทฆๅๅใจๅณๅๅใฏ
ๅใใซใชใ
'''
sl = s[0:n]
sr = s[n:2*n][::-1]
keys1 = [c[0]+'-'+c[1] for c in comb(sl)]
keys2 = [c[0]+'-'+c[1] for c in comb(sr)]
cnt = 0
for key1 in keys1:
cnt += keys2.count(key1)
return cnt
'''
dict = {}
for t0, t1 in keys:
key = t0 + '-' + t1
cnt = has_key(sr, t0, t1)
if key in dict:
dict[key] += cnt
else:
dict[key] = cnt
return sum(dict.values())
'''
def comb(s):
if len(s) == 1:
return [(s, ''), ('', s)]
else:
ret = []
for c in comb(s[0:len(s)-1]):
ret.append((c[0]+s[-1], c[1]))
ret.append((c[0], c[1]+s[-1]))
return ret
'''
def has_key(s, t0, t1):
cnt = 0
if len(s) == 1:
if s == t0:
return 1
elif s == t1:
return 1
else:
return 0
else:
a = s[0]
if len(t0) != 0 and a == t0[0]:
cnt += has_key(s[1:len(s)], t0[1:len(t0)], t1)
if len(t1) != 0 and a == t1[0]:
cnt += has_key(s[1:len(s)], t0, t1[1:len(t1)])
return cnt
'''
def read_line():
n = int(input())
s = input()
return (n, s)
def main():
n, s = read_line()
print(run(n, s))
if __name__ == '__main__':
main()
``` | instruction | 0 | 19,215 | 18 | 38,430 |
No | output | 1 | 19,215 | 18 | 38,431 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
You are given a string S of length 2N consisting of lowercase English letters.
There are 2^{2N} ways to color each character in S red or blue. Among these ways, how many satisfy the following condition?
* The string obtained by reading the characters painted red from left to right is equal to the string obtained by reading the characters painted blue from right to left.
Constraints
* 1 \leq N \leq 18
* The length of S is 2N.
* S consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
N
S
Output
Print the number of ways to paint the string that satisfy the condition.
Examples
Input
4
cabaacba
Output
4
Input
11
mippiisssisssiipsspiim
Output
504
Input
4
abcdefgh
Output
0
Input
18
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Output
9075135300
Submitted Solution:
```
import itertools
import queue
N=int(input())
S=input()
ans=0
for seq in itertools.product([0,1],repeat=N):
T0=""
T1=""
T2=""
for i in range(N):
if seq[i]==0:
T0=T0+S[i]
else:
T1=T1+S[i]
T2+=S[-i-1]
q=[queue.Queue() for i in range(N+1)]
q[0].put((0,0))
a0=len(T0)
a1=len(T1)
#print(T0,T1,T2)
for i in range(N):
while(not(q[i].empty())):
r=q[i].get()
#print(i,r)
#print(r)
if r[0]+r[1]>=N:
continue
if r[0]>=a0:
if T2[r[1]+r[0]]==T1[r[1]]:
q[i+1].put((r[0],r[1]+1))
elif r[1]>=a1:
if T2[r[1]+r[0]]==T0[r[0]]:
q[i+1].put((r[0]+1,r[1]))
else:
if T2[r[1]+r[0]]==T0[r[0]]:
q[i+1].put((r[0]+1,r[1]))
if T2[r[1]+r[0]]==T1[r[1]]:
q[i+1].put((r[0],r[1]+1))
while(not(q[N].empty())):
r=q[N].get()
#print(N,r)
ans+=1
#print(ans)
print(ans)
``` | instruction | 0 | 19,216 | 18 | 38,432 |
No | output | 1 | 19,216 | 18 | 38,433 |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.