message stringlengths 2 23.4k | message_type stringclasses 2
values | message_id int64 0 1 | conversation_id int64 129 108k | cluster float64 6 6 | __index_level_0__ int64 258 216k |
|---|---|---|---|---|---|
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Sergey attends lessons of the N-ish language. Each lesson he receives a hometask. This time the task is to translate some sentence to the N-ish language. Sentences of the N-ish language can be r... | instruction | 0 | 71,008 | 6 | 142,016 |
No | output | 1 | 71,008 | 6 | 142,017 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Jabber ID on the national Berland service «Babber» has a form <username>@<hostname>[/resource], where
* <username> — is a sequence of Latin letters (lowercase or uppercase), digits or underscores characters «_», the length of <username> ... | instruction | 0 | 71,025 | 6 | 142,050 |
Tags: implementation, strings
Correct Solution:
```
#In the name of GOD!
def chk(s):
if len(s) == 0 or len(s) > 16: return 1
for i in s:
if not(('a' <= i and i <= 'z') or ('A' <= i and i <= 'Z') or ('0' <= i and i <= '9') or i == '_'):
return 1
return 0
s = input()
c = ''
x = 0
b = 0
for i in s:
x += 1
if i... | output | 1 | 71,025 | 6 | 142,051 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Jabber ID on the national Berland service «Babber» has a form <username>@<hostname>[/resource], where
* <username> — is a sequence of Latin letters (lowercase or uppercase), digits or underscores characters «_», the length of <username> ... | instruction | 0 | 71,026 | 6 | 142,052 |
Tags: implementation, strings
Correct Solution:
```
try:
result = True
jabber_id = input().lower().replace("/n", "")
username = jabber_id.split("@", 1)[0]
hostname = jabber_id.split("@", 1)[1].split("/")[0]
try:
resource = jabber_id.split("@", 1)[1].split("/", 1)[1]
if not resource:
... | output | 1 | 71,026 | 6 | 142,053 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Jabber ID on the national Berland service «Babber» has a form <username>@<hostname>[/resource], where
* <username> — is a sequence of Latin letters (lowercase or uppercase), digits or underscores characters «_», the length of <username> ... | instruction | 0 | 71,027 | 6 | 142,054 |
Tags: implementation, strings
Correct Solution:
```
def check(txt: str) -> bool:
ln = len(txt)
if ln == 0 or ln > 16:
return False
for item in txt:
if not ('a' <= item <= 'z' or
'A' <= item <= 'Z' or
'0' <= item <= '9' or
item == '_'):
... | output | 1 | 71,027 | 6 | 142,055 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Jabber ID on the national Berland service «Babber» has a form <username>@<hostname>[/resource], where
* <username> — is a sequence of Latin letters (lowercase or uppercase), digits or underscores characters «_», the length of <username> ... | instruction | 0 | 71,028 | 6 | 142,056 |
Tags: implementation, strings
Correct Solution:
```
string = input()
answer = "YES"
Ausername = "ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz0123456789"
if "@" in string:
string = string.split("@")
if len(string) > 2: answer = "NO"
if len(string[0]) < 1 or len(string[0]) > 16: answer = "NO"
for char in str... | output | 1 | 71,028 | 6 | 142,057 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Jabber ID on the national Berland service «Babber» has a form <username>@<hostname>[/resource], where
* <username> — is a sequence of Latin letters (lowercase or uppercase), digits or underscores characters «_», the length of <username> ... | instruction | 0 | 71,029 | 6 | 142,058 |
Tags: implementation, strings
Correct Solution:
```
'''
def userName(s):
for i in range(s.index('@')):
if not '0' <= s[i] <= '9' or 'a' <= s[i] <= 'z' or 'A' <= s[i] <= 'Z':
return False
else:
return True
def hostName(s):
if '/' in s:
for i in range(s.index('@')... | output | 1 | 71,029 | 6 | 142,059 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Jabber ID on the national Berland service «Babber» has a form <username>@<hostname>[/resource], where
* <username> — is a sequence of Latin letters (lowercase or uppercase), digits or underscores characters «_», the length of <username> ... | instruction | 0 | 71,030 | 6 | 142,060 |
Tags: implementation, strings
Correct Solution:
```
import re
string = input( )
pattern = re.compile("^\w{1,16}@(\w{1,16}\.)*\w{1,16}(|/\w{1,16})$")
if pattern.match( string ) :
print( "YES" )
else :
print( "NO" )
``` | output | 1 | 71,030 | 6 | 142,061 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Jabber ID on the national Berland service «Babber» has a form <username>@<hostname>[/resource], where
* <username> — is a sequence of Latin letters (lowercase or uppercase), digits or underscores characters «_», the length of <username> ... | instruction | 0 | 71,031 | 6 | 142,062 |
Tags: implementation, strings
Correct Solution:
```
s=input()
a=s.split('@')
if len(a)!=2:
print("NO")
exit()
un=a[0].upper()
for c in un:
if not (c>="A" and c<="Z" or c=="_" or c>='0' and c<='9'):
print("NO")
exit()
if len(un)<1 or len(un)>16:
print("NO")
exit()
b=a[1].split("/")
if... | output | 1 | 71,031 | 6 | 142,063 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Jabber ID on the national Berland service «Babber» has a form <username>@<hostname>[/resource], where
* <username> — is a sequence of Latin letters (lowercase or uppercase), digits or underscores characters «_», the length of <username> ... | instruction | 0 | 71,032 | 6 | 142,064 |
Tags: implementation, strings
Correct Solution:
```
def w(s):
return s.isalnum() and len(s) <= 16
def v(s):
i1, i2 = s.find('@'), s.rfind('/')
if i1 == -1 or (i2 > -1 and i1 > i2):
return False
elif not w(s[:i1]) or (i2 > -1 and not w(s[i2 + 1:])):
return False
else:
return a... | output | 1 | 71,032 | 6 | 142,065 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Fox Ciel is going to publish a paper on FOCS (Foxes Operated Computer Systems, pronounce: "Fox"). She heard a rumor: the authors list on the paper is always sorted in the lexicographical order.
After checking some examples, she found out t... | instruction | 0 | 72,040 | 6 | 144,080 |
Tags: dfs and similar, graphs, sortings
Correct Solution:
```
# Author : nitish420 --------------------------------------------------------------------
import os
import sys
from io import BytesIO, IOBase
def main():
n=int(input())
l=[]
for _ in range(n):
l.append(list(input()))
graph=[set() f... | output | 1 | 72,040 | 6 | 144,081 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Fox Ciel is going to publish a paper on FOCS (Foxes Operated Computer Systems, pronounce: "Fox"). She heard a rumor: the authors list on the paper is always sorted in the lexicographical order.
After checking some examples, she found out t... | instruction | 0 | 72,041 | 6 | 144,082 |
Tags: dfs and similar, graphs, sortings
Correct Solution:
```
__author__ = 'Utena'
n=int(input())
e=[]
def cmp(a,b):
for i in range(min(len(a),len(b))):
if a[i]!=b[i]:
e.append((a[i],b[i]))
return 0
if len(a)>len(b):
print('Impossible')
exit(0)
def indegree0(v,e):... | output | 1 | 72,041 | 6 | 144,083 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Fox Ciel is going to publish a paper on FOCS (Foxes Operated Computer Systems, pronounce: "Fox"). She heard a rumor: the authors list on the paper is always sorted in the lexicographical order.
After checking some examples, she found out t... | instruction | 0 | 72,042 | 6 | 144,084 |
Tags: dfs and similar, graphs, sortings
Correct Solution:
```
from collections import deque
from sys import stdout
def toposort(graph, indegrees):
sort = deque()
zeros = deque()
for node in indegrees:
if indegrees[node] == 0:
zeros.append(node)
while len(zeros) > 0:
node = z... | output | 1 | 72,042 | 6 | 144,085 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Fox Ciel is going to publish a paper on FOCS (Foxes Operated Computer Systems, pronounce: "Fox"). She heard a rumor: the authors list on the paper is always sorted in the lexicographical order.
After checking some examples, she found out t... | instruction | 0 | 72,043 | 6 | 144,086 |
Tags: dfs and similar, graphs, sortings
Correct Solution:
```
# 510C
import string
__author__ = 'artyom'
graph = dict((c, set()) for c in string.ascii_lowercase)
ordered = []
visited = set()
in_stack = dict((c, 0) for c in string.ascii_lowercase)
def dfs(v):
visited.add(v)
in_stack[v] = 1
for u in graph[v]:
... | output | 1 | 72,043 | 6 | 144,087 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Fox Ciel is going to publish a paper on FOCS (Foxes Operated Computer Systems, pronounce: "Fox"). She heard a rumor: the authors list on the paper is always sorted in the lexicographical order.
After checking some examples, she found out t... | instruction | 0 | 72,044 | 6 | 144,088 |
Tags: dfs and similar, graphs, sortings
Correct Solution:
```
import string
__author__ = 'artyom'
graph = dict((c, set()) for c in string.ascii_lowercase)
ordered = []
visited = set()
in_stack = dict((c, 0) for c in string.ascii_lowercase)
def dfs(v):
visited.add(v)
in_stack[v] = 1
for u in graph[v]:
if ... | output | 1 | 72,044 | 6 | 144,089 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Fox Ciel is going to publish a paper on FOCS (Foxes Operated Computer Systems, pronounce: "Fox"). She heard a rumor: the authors list on the paper is always sorted in the lexicographical order.
After checking some examples, she found out t... | instruction | 0 | 72,045 | 6 | 144,090 |
Tags: dfs and similar, graphs, sortings
Correct Solution:
```
s, n = 1, int(input())
a, b = [], []
t = ''
d = [0] * 26
u = input()
exit = False
for i in range(n - 1):
v = input()
j = 0
while j < min(len(u), len(v)) and u[j] == v[j]:
j += 1
if j == min(len(u), len(v)):
if len(u) >= len... | output | 1 | 72,045 | 6 | 144,091 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Fox Ciel is going to publish a paper on FOCS (Foxes Operated Computer Systems, pronounce: "Fox"). She heard a rumor: the authors list on the paper is always sorted in the lexicographical order.
After checking some examples, she found out t... | instruction | 0 | 72,046 | 6 | 144,092 |
Tags: dfs and similar, graphs, sortings
Correct Solution:
```
from heapq import heappush, heappop
def ts_kahn(graph, result):
indegree = [0] * (V+1)
zero_indegree = []
for u in range(1,V+1):
for v in graph[u]:
indegree[v] += 1
for i in range(1,V+1):
if (indegree[i] == 0):
... | output | 1 | 72,046 | 6 | 144,093 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Fox Ciel is going to publish a paper on FOCS (Foxes Operated Computer Systems, pronounce: "Fox"). She heard a rumor: the authors list on the paper is always sorted in the lexicographical order.
After checking some examples, she found out t... | instruction | 0 | 72,047 | 6 | 144,094 |
Tags: dfs and similar, graphs, sortings
Correct Solution:
```
from itertools import zip_longest
def main():
names = [input() for _ in range(int(input()))]
edges = [set() for _ in range(27)]
for na, nb in zip(names, names[1:]):
for a, b in zip_longest(na, nb, fillvalue='`'):
if a != b:
... | output | 1 | 72,047 | 6 | 144,095 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Fox Ciel is going to publish a paper on FOCS (Foxes Operated Computer Systems, pronounce: "Fox"). She heard a rumor: the authors list on the paper is always sorted in the lexicographical order. ... | instruction | 0 | 72,048 | 6 | 144,096 |
Yes | output | 1 | 72,048 | 6 | 144,097 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Fox Ciel is going to publish a paper on FOCS (Foxes Operated Computer Systems, pronounce: "Fox"). She heard a rumor: the authors list on the paper is always sorted in the lexicographical order. ... | instruction | 0 | 72,049 | 6 | 144,098 |
Yes | output | 1 | 72,049 | 6 | 144,099 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Fox Ciel is going to publish a paper on FOCS (Foxes Operated Computer Systems, pronounce: "Fox"). She heard a rumor: the authors list on the paper is always sorted in the lexicographical order. ... | instruction | 0 | 72,050 | 6 | 144,100 |
Yes | output | 1 | 72,050 | 6 | 144,101 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Fox Ciel is going to publish a paper on FOCS (Foxes Operated Computer Systems, pronounce: "Fox"). She heard a rumor: the authors list on the paper is always sorted in the lexicographical order. ... | instruction | 0 | 72,051 | 6 | 144,102 |
Yes | output | 1 | 72,051 | 6 | 144,103 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Fox Ciel is going to publish a paper on FOCS (Foxes Operated Computer Systems, pronounce: "Fox"). She heard a rumor: the authors list on the paper is always sorted in the lexicographical order. ... | instruction | 0 | 72,052 | 6 | 144,104 |
No | output | 1 | 72,052 | 6 | 144,105 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Fox Ciel is going to publish a paper on FOCS (Foxes Operated Computer Systems, pronounce: "Fox"). She heard a rumor: the authors list on the paper is always sorted in the lexicographical order. ... | instruction | 0 | 72,053 | 6 | 144,106 |
No | output | 1 | 72,053 | 6 | 144,107 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Fox Ciel is going to publish a paper on FOCS (Foxes Operated Computer Systems, pronounce: "Fox"). She heard a rumor: the authors list on the paper is always sorted in the lexicographical order. ... | instruction | 0 | 72,054 | 6 | 144,108 |
No | output | 1 | 72,054 | 6 | 144,109 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Fox Ciel is going to publish a paper on FOCS (Foxes Operated Computer Systems, pronounce: "Fox"). She heard a rumor: the authors list on the paper is always sorted in the lexicographical order. ... | instruction | 0 | 72,055 | 6 | 144,110 |
No | output | 1 | 72,055 | 6 | 144,111 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Tyndex is again well ahead of the rivals! The reaction to the release of Zoozle Chrome browser was the release of a new browser Tyndex.Brome!
The popularity of the new browser is growing daily. And the secret is not even the Tyndex.Bar inst... | instruction | 0 | 72,099 | 6 | 144,198 |
Tags: binary search, implementation
Correct Solution:
```
from bisect import bisect_left
n, k = map(int, input().split())
q = 'abcdefghijklmnopqrstuvwxyz'
a = {i: [] for i in q}
for i, j in enumerate(input()): a[j].append(i)
def g(t): return [(t[i] + t[i - 1]) // 2 for i in range(1, len(t))]
c = {i: g(a[i]) for i in... | output | 1 | 72,099 | 6 | 144,199 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Tyndex is again well ahead of the rivals! The reaction to the release of Zoozle Chrome browser was the release of a new browser Tyndex.Brome!
The popularity of the new browser is growing daily. And the secret is not even the Tyndex.Bar inst... | instruction | 0 | 72,100 | 6 | 144,200 |
Tags: binary search, implementation
Correct Solution:
```
# https://codeforces.com/problemset/problem/62/B
# bin search
def search(val):
l = 0
r = 1
while l <= r:
pass
def calc_f(arr, val):
n = len(arr)
l = 0
r = n - 1
last_less = False
while l <= r:
m = l + (r - l... | output | 1 | 72,100 | 6 | 144,201 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Tyndex is again well ahead of the rivals! The reaction to the release of Zoozle Chrome browser was the release of a new browser Tyndex.Brome!
The popularity of the new browser is growing daily. And the secret is not even the Tyndex.Bar inst... | instruction | 0 | 72,101 | 6 | 144,202 |
Tags: binary search, implementation
Correct Solution:
```
from bisect import bisect_left
n,k=map(int,input().split())
q="abcdefghijklmnopqrstuvwxyz"
a={i:[] for i in q}
for key,value in enumerate(input()):a[value].append(key)
#print(a)
def g(t):return [(t[i]+t[i-1])//2 for i in range(1,len(t))] #类似于二分查找的思路 //便于快速确定... | output | 1 | 72,101 | 6 | 144,203 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Tyndex is again well ahead of the rivals! The reaction to the release of Zoozle Chrome browser was the release of a new browser Tyndex.Brome!
The popularity of the new browser is growing daily. And the secret is not even the Tyndex.Bar inst... | instruction | 0 | 72,102 | 6 | 144,204 |
Tags: binary search, implementation
Correct Solution:
```
def g(t): return [(t[i] + t[i - 1]) // 2 for i in range(1, len(t))] + [1000000]
def h(a, b, c):
j = s = 0
for i in b:
while i > c[j]: j += 1
s += abs(i - a[j])
return s
n, k = map(int, input().split())
q = 'abcdefghijklmnopqrstuvwxyz... | output | 1 | 72,102 | 6 | 144,205 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Tyndex is again well ahead of the rivals! The reaction to the release of Zoozle Chrome browser was the release of a new browser Tyndex.Brome!
The popularity of the new browser is growing daily. And the secret is not even the Tyndex.Bar inst... | instruction | 0 | 72,103 | 6 | 144,206 |
Tags: binary search, implementation
Correct Solution:
```
def g(t): return [(t[i] + t[i - 1]) // 2 for i in range(1, len(t))] + [1000000]
def h(a, b, c):
j = s = 0
for i in b:
while i > c[j]: j += 1
s += abs(i - a[j])
return s
n, k = map(int, input().split())
q = 'abcdefghijklmnopq... | output | 1 | 72,103 | 6 | 144,207 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Input
The input contains a single integer a (0 ≤ a ≤ 35).
Output
Output a single integer.
Examples
Input
3
Output
8
Input
10
Output
1024 | instruction | 0 | 72,108 | 6 | 144,216 |
Tags: *special
Correct Solution:
```
i = int(input())
stringarrPresidents = ["Washington", "Adams", "Jefferson", "Madison", "Monroe", "Adams", "Jackson", "Van Buren", "Harrison", "Tyler", "Polk", "Taylor", "Fillmore", "Pierce", "Buchanan", "Lincoln", "Johnson", "Grant", "Hayes", "Garfield", "Arthur", "Cleveland", "Harr... | output | 1 | 72,108 | 6 | 144,217 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp is mad about coding, that is why he writes Sveta encoded messages. He calls the median letter in a word the letter which is in the middle of the word. If the word's length is even, the median letter is the left of the two middle let... | instruction | 0 | 72,169 | 6 | 144,338 |
Tags: implementation, strings
Correct Solution:
```
n = int(input())
encoded = list(input())
left, right = '', ''
while True:
try:
right = encoded[-1] + right
encoded.pop()
left += encoded[-1]
encoded.pop()
except:
break
print(left + right)
``` | output | 1 | 72,169 | 6 | 144,339 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp is mad about coding, that is why he writes Sveta encoded messages. He calls the median letter in a word the letter which is in the middle of the word. If the word's length is even, the median letter is the left of the two middle let... | instruction | 0 | 72,170 | 6 | 144,340 |
Tags: implementation, strings
Correct Solution:
```
n=int(input())
l=list(input())
a=[""]*n
if n%2!=0:
k=1
mid=n//2
a[mid]=l[0]
for i in range(1,n):
if i%2!=0:
a[mid-k]=l[i]
else:
a[mid+k]=l[i]
k+=1
print("".join(a))
else:
k=0
t=1
mid=(n//2)-1
for i in range(0,n):
if i%2=... | output | 1 | 72,170 | 6 | 144,341 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp is mad about coding, that is why he writes Sveta encoded messages. He calls the median letter in a word the letter which is in the middle of the word. If the word's length is even, the median letter is the left of the two middle let... | instruction | 0 | 72,171 | 6 | 144,342 |
Tags: implementation, strings
Correct Solution:
```
n = int(input())
s = input()
a = []
b = []
j = ''
j = s[0]
for i in range(1,n):
if i % 2 != 0:
q = s[i]
q += j
j = q
else:
j += s[i]
if n % 2 == 0:
j = j[::-1]
print(j)
``` | output | 1 | 72,171 | 6 | 144,343 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp is mad about coding, that is why he writes Sveta encoded messages. He calls the median letter in a word the letter which is in the middle of the word. If the word's length is even, the median letter is the left of the two middle let... | instruction | 0 | 72,172 | 6 | 144,344 |
Tags: implementation, strings
Correct Solution:
```
input();s=input().strip();k=len(s)%2;print(s[k::2][::-1]+s[k^1::2])
``` | output | 1 | 72,172 | 6 | 144,345 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp is mad about coding, that is why he writes Sveta encoded messages. He calls the median letter in a word the letter which is in the middle of the word. If the word's length is even, the median letter is the left of the two middle let... | instruction | 0 | 72,173 | 6 | 144,346 |
Tags: implementation, strings
Correct Solution:
```
def decode(s):
res = "" + s[0]
string = []
for letter in s:
string.append(letter)
string = string[1:]
while len(string) != 0:
if len(string) % 2 == 0:
res = str(string[0]) + res
else:
res ... | output | 1 | 72,173 | 6 | 144,347 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp is mad about coding, that is why he writes Sveta encoded messages. He calls the median letter in a word the letter which is in the middle of the word. If the word's length is even, the median letter is the left of the two middle let... | instruction | 0 | 72,174 | 6 | 144,348 |
Tags: implementation, strings
Correct Solution:
```
n = int(input())
s = input()
wynik = ''
prawa = False
if n % 2 == 1:
prawa = True
for i in s:
if prawa:
wynik += i
prawa = False
else:
wynik = i + wynik
prawa = True
print(wynik)
``` | output | 1 | 72,174 | 6 | 144,349 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp is mad about coding, that is why he writes Sveta encoded messages. He calls the median letter in a word the letter which is in the middle of the word. If the word's length is even, the median letter is the left of the two middle let... | instruction | 0 | 72,175 | 6 | 144,350 |
Tags: implementation, strings
Correct Solution:
```
import math
n = int(input())
w = list(input())
e = []
if n % 2 == 0:
s = 1
else:
s = 0
for x in range(0, n):
if s == 1:
e.insert(math.floor(len(e) / 2) - x - x, w[x])
s = 0
elif s == 0:
e.insert(math.floor(len(e) / 2) + x + x, ... | output | 1 | 72,175 | 6 | 144,351 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Polycarp is mad about coding, that is why he writes Sveta encoded messages. He calls the median letter in a word the letter which is in the middle of the word. If the word's length is even, the median letter is the left of the two middle let... | instruction | 0 | 72,176 | 6 | 144,352 |
Tags: implementation, strings
Correct Solution:
```
import math
n = int(input())
s = input()
s = list(s)
s.reverse()
s1 = []
for i in s:
if (len(s1) % 2 == 0):
s1.insert(len(s1) // 2, i)
else:
s1.insert(math.ceil(len(s1) / 2), i)
s1.reverse()
q = ''
for i in s1:
q += i
print(q)
``` | output | 1 | 72,176 | 6 | 144,353 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarp is mad about coding, that is why he writes Sveta encoded messages. He calls the median letter in a word the letter which is in the middle of the word. If the word's length is even, the ... | instruction | 0 | 72,177 | 6 | 144,354 |
Yes | output | 1 | 72,177 | 6 | 144,355 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarp is mad about coding, that is why he writes Sveta encoded messages. He calls the median letter in a word the letter which is in the middle of the word. If the word's length is even, the ... | instruction | 0 | 72,178 | 6 | 144,356 |
Yes | output | 1 | 72,178 | 6 | 144,357 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarp is mad about coding, that is why he writes Sveta encoded messages. He calls the median letter in a word the letter which is in the middle of the word. If the word's length is even, the ... | instruction | 0 | 72,179 | 6 | 144,358 |
Yes | output | 1 | 72,179 | 6 | 144,359 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarp is mad about coding, that is why he writes Sveta encoded messages. He calls the median letter in a word the letter which is in the middle of the word. If the word's length is even, the ... | instruction | 0 | 72,180 | 6 | 144,360 |
Yes | output | 1 | 72,180 | 6 | 144,361 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarp is mad about coding, that is why he writes Sveta encoded messages. He calls the median letter in a word the letter which is in the middle of the word. If the word's length is even, the ... | instruction | 0 | 72,181 | 6 | 144,362 |
No | output | 1 | 72,181 | 6 | 144,363 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarp is mad about coding, that is why he writes Sveta encoded messages. He calls the median letter in a word the letter which is in the middle of the word. If the word's length is even, the ... | instruction | 0 | 72,182 | 6 | 144,364 |
No | output | 1 | 72,182 | 6 | 144,365 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarp is mad about coding, that is why he writes Sveta encoded messages. He calls the median letter in a word the letter which is in the middle of the word. If the word's length is even, the ... | instruction | 0 | 72,183 | 6 | 144,366 |
No | output | 1 | 72,183 | 6 | 144,367 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Polycarp is mad about coding, that is why he writes Sveta encoded messages. He calls the median letter in a word the letter which is in the middle of the word. If the word's length is even, the ... | instruction | 0 | 72,184 | 6 | 144,368 |
No | output | 1 | 72,184 | 6 | 144,369 |
Provide tags and a correct Python 3 solution for this coding contest problem.
A string a of length m is called antipalindromic iff m is even, and for each i (1 ≤ i ≤ m) ai ≠ am - i + 1.
Ivan has a string s consisting of n lowercase Latin letters; n is even. He wants to form some string t that will be an antipalindrom... | instruction | 0 | 72,229 | 6 | 144,458 |
Tags: flows, graphs, greedy
Correct Solution:
```
class letter(object):
def __init__(self,let,val):
self.let=let
self.val=val
def __lt__(self,other):
return self.val<other.val
n=int(input())
s=input()
candi=[[] for i in range(n//2)]
ans=0
for i,vl in enumerate(map(int,input().split()))... | output | 1 | 72,229 | 6 | 144,459 |
Provide tags and a correct Python 3 solution for this coding contest problem.
A string a of length m is called antipalindromic iff m is even, and for each i (1 ≤ i ≤ m) ai ≠ am - i + 1.
Ivan has a string s consisting of n lowercase Latin letters; n is even. He wants to form some string t that will be an antipalindrom... | instruction | 0 | 72,231 | 6 | 144,462 |
Tags: flows, graphs, greedy
Correct Solution:
```
from collections import *
n = int(input())
s = input()
b = [int (i) for i in input().split(' ')]
n = n
cnt = defaultdict(int)
multiples = []
biggest = 'a'
ans = 0
for i in range(n//2):
if(s[i] == s[n-i-1]):
multiples.append(i)
cnt[s[i]] += 1
... | output | 1 | 72,231 | 6 | 144,463 |
Provide tags and a correct Python 3 solution for this coding contest problem.
A string a of length m is called antipalindromic iff m is even, and for each i (1 ≤ i ≤ m) ai ≠ am - i + 1.
Ivan has a string s consisting of n lowercase Latin letters; n is even. He wants to form some string t that will be an antipalindrom... | instruction | 0 | 72,232 | 6 | 144,464 |
Tags: flows, graphs, greedy
Correct Solution:
```
from collections import Counter
r = lambda: map(int, input().split())
def main():
n, = r()
s = input()
cost = list(r())
ans = 0
cnt = Counter()
for i in range(n // 2):
if s[i] == s[n - 1 - i]:
ans += min(cost[i], cost[n - 1 - i])
cnt[s[i]] += 1
total... | output | 1 | 72,232 | 6 | 144,465 |
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