message stringlengths 2 15.4k | message_type stringclasses 2
values | message_id int64 0 1 | conversation_id int64 45 107k | cluster float64 21 21 | __index_level_0__ int64 90 214k |
|---|---|---|---|---|---|
Provide tags and a correct Python 3 solution for this coding contest problem.
As you probably know, Anton goes to school. One of the school subjects that Anton studies is Bracketology. On the Bracketology lessons students usually learn different sequences that consist of round brackets (characters "(" and ")" (without... | instruction | 0 | 90,602 | 21 | 181,204 |
Tags: combinatorics, dp, math, number theory
Correct Solution:
```
t = input()
n, m = len(t) + 1, 1000000007
x, y = 0, t.count(')') - 1
fact = [1] * n
for i in range(2, n): fact[i] = i * fact[i - 1] % m
invMult = [pow(x, m - 2, m) for x in fact]
s = 0
for b in t:
if y < 0: break
if b == '(':
x += 1
... | output | 1 | 90,602 | 21 | 181,205 |
Provide tags and a correct Python 3 solution for this coding contest problem.
As you probably know, Anton goes to school. One of the school subjects that Anton studies is Bracketology. On the Bracketology lessons students usually learn different sequences that consist of round brackets (characters "(" and ")" (without... | instruction | 0 | 90,603 | 21 | 181,206 |
Tags: combinatorics, dp, math, number theory
Correct Solution:
```
s = input()
MOD = 10 ** 9 + 7
num = 0
N = len(s)
R = [0] * (N + 1)
L = [0] * (N + 1)
d = []
for i in range(N):
if s[i] == ')':
R[i + 1] = 1
else:
L[i + 1] = 1
d.append(i)
for i in range(1, N + 1):
R[i] += R[i - 1]
... | output | 1 | 90,603 | 21 | 181,207 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
As you probably know, Anton goes to school. One of the school subjects that Anton studies is Bracketology. On the Bracketology lessons students usually learn different sequences that consist of ... | instruction | 0 | 90,604 | 21 | 181,208 |
Yes | output | 1 | 90,604 | 21 | 181,209 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
As you probably know, Anton goes to school. One of the school subjects that Anton studies is Bracketology. On the Bracketology lessons students usually learn different sequences that consist of ... | instruction | 0 | 90,605 | 21 | 181,210 |
Yes | output | 1 | 90,605 | 21 | 181,211 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
As you probably know, Anton goes to school. One of the school subjects that Anton studies is Bracketology. On the Bracketology lessons students usually learn different sequences that consist of ... | instruction | 0 | 90,606 | 21 | 181,212 |
No | output | 1 | 90,606 | 21 | 181,213 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
As you probably know, Anton goes to school. One of the school subjects that Anton studies is Bracketology. On the Bracketology lessons students usually learn different sequences that consist of ... | instruction | 0 | 90,607 | 21 | 181,214 |
No | output | 1 | 90,607 | 21 | 181,215 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
As you probably know, Anton goes to school. One of the school subjects that Anton studies is Bracketology. On the Bracketology lessons students usually learn different sequences that consist of ... | instruction | 0 | 90,608 | 21 | 181,216 |
No | output | 1 | 90,608 | 21 | 181,217 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
As you probably know, Anton goes to school. One of the school subjects that Anton studies is Bracketology. On the Bracketology lessons students usually learn different sequences that consist of ... | instruction | 0 | 90,609 | 21 | 181,218 |
No | output | 1 | 90,609 | 21 | 181,219 |
Provide tags and a correct Python 3 solution for this coding contest problem.
A bracketed sequence is called correct (regular) if by inserting "+" and "1" you can get a well-formed mathematical expression from it. For example, sequences "(())()", "()" and "(()(()))" are correct, while ")(", "(()" and "(()))(" are not.... | instruction | 0 | 92,758 | 21 | 185,516 |
Tags: greedy
Correct Solution:
```
import sys
input = sys.stdin.readline
N = int(input())
S = input().rstrip()
A = [0]
for s in S:
a = 1 if s == "(" else -1
A.append(A[-1]+a)
isOK = True
ans = 0
last0 = 0
for i, a in enumerate(A):
if a == 0:
if not isOK:
ans += i - last0
last0... | output | 1 | 92,758 | 21 | 185,517 |
Provide tags and a correct Python 3 solution for this coding contest problem.
A bracketed sequence is called correct (regular) if by inserting "+" and "1" you can get a well-formed mathematical expression from it. For example, sequences "(())()", "()" and "(()(()))" are correct, while ")(", "(()" and "(()))(" are not.... | instruction | 0 | 92,759 | 21 | 185,518 |
Tags: greedy
Correct Solution:
```
n = int(input())
a = input()
if a.count('(') != a.count(')'):
print("-1")
else :
c=0
d=0
for i in a :
if i == '(' :
c+=1
else:
c-=1
if c<0:
d+=2
print(d)
``` | output | 1 | 92,759 | 21 | 185,519 |
Provide tags and a correct Python 3 solution for this coding contest problem.
A bracketed sequence is called correct (regular) if by inserting "+" and "1" you can get a well-formed mathematical expression from it. For example, sequences "(())()", "()" and "(()(()))" are correct, while ")(", "(()" and "(()))(" are not.... | instruction | 0 | 92,760 | 21 | 185,520 |
Tags: greedy
Correct Solution:
```
import sys
#import math
#from collections import deque
#import heapq
input=sys.stdin.readline
n=int(input())
s=input()
l=list()
open=list()
close=list()
for i in range(n):
if(s[i]=='('):
open.append(i)
else:
close.append(i)
if(len(open)!=len(close)):
print... | output | 1 | 92,760 | 21 | 185,521 |
Provide tags and a correct Python 3 solution for this coding contest problem.
A bracketed sequence is called correct (regular) if by inserting "+" and "1" you can get a well-formed mathematical expression from it. For example, sequences "(())()", "()" and "(()(()))" are correct, while ")(", "(()" and "(()))(" are not.... | instruction | 0 | 92,761 | 21 | 185,522 |
Tags: greedy
Correct Solution:
```
t=int(input())
s=input()
if s.count('(') != s.count(')'):
print(-1)
else:
ans=[]
negval=0
val=0
for i in range(len(s)):
if s[i] == '(':
val+=1
if val == 0:
ans.append(-1)
else:
ans.append(v... | output | 1 | 92,761 | 21 | 185,523 |
Provide tags and a correct Python 3 solution for this coding contest problem.
A bracketed sequence is called correct (regular) if by inserting "+" and "1" you can get a well-formed mathematical expression from it. For example, sequences "(())()", "()" and "(()(()))" are correct, while ")(", "(()" and "(()))(" are not.... | instruction | 0 | 92,762 | 21 | 185,524 |
Tags: greedy
Correct Solution:
```
#import io,os
#input = io.BytesIO(os.read(0, os.fstat(0).st_size)).readline
import sys
input = sys.stdin.readline
from collections import defaultdict
def main():
#for _ in range(int(input())):
n = int(input())
s = input()
cnt = defaultdict(int)
for i in range(n):
... | output | 1 | 92,762 | 21 | 185,525 |
Provide tags and a correct Python 3 solution for this coding contest problem.
A bracketed sequence is called correct (regular) if by inserting "+" and "1" you can get a well-formed mathematical expression from it. For example, sequences "(())()", "()" and "(()(()))" are correct, while ")(", "(()" and "(()))(" are not.... | instruction | 0 | 92,763 | 21 | 185,526 |
Tags: greedy
Correct Solution:
```
p=int(input())
q=input()
x=q.count(')')
y=q.count('(')
c=0
l=0
r=0
z=0
sum=0
if x!=y :
print(-1)
c=1
if c==0 :
for i in range(p) :
if q[i]=='(' :
l+=1
else :
r+=1
if r>l :
z=1
if l==r and z==0 :
# print("xxxxxxxxxx",l,r)
l=0
r=0
if l==r and z==1 :
#... | output | 1 | 92,763 | 21 | 185,527 |
Provide tags and a correct Python 3 solution for this coding contest problem.
A bracketed sequence is called correct (regular) if by inserting "+" and "1" you can get a well-formed mathematical expression from it. For example, sequences "(())()", "()" and "(()(()))" are correct, while ")(", "(()" and "(()))(" are not.... | instruction | 0 | 92,764 | 21 | 185,528 |
Tags: greedy
Correct Solution:
```
n = int(input())
s = input()
stack = []
stack2 = []
pair = 0
if s.count(')') != s.count('('):
print(-1)
else:
for i in s:
if i == '(':
stack2.append(i)
if i == ')':
if stack2:
del stack2[-1]
else:
... | output | 1 | 92,764 | 21 | 185,529 |
Provide tags and a correct Python 3 solution for this coding contest problem.
A bracketed sequence is called correct (regular) if by inserting "+" and "1" you can get a well-formed mathematical expression from it. For example, sequences "(())()", "()" and "(()(()))" are correct, while ")(", "(()" and "(()))(" are not.... | instruction | 0 | 92,765 | 21 | 185,530 |
Tags: greedy
Correct Solution:
```
n=int(input())
s=input()
a=0
b=0
for i in range(0,len(s)):
if s[i]==')':
a+=1
else:
b+=1
if a!=b:
print(-1)
else:
count=0
stack=[]
i=0
while i<len(s):
a=0
b=0
if s[i]=='(':
stack.append(s[i])
els... | output | 1 | 92,765 | 21 | 185,531 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A bracketed sequence is called correct (regular) if by inserting "+" and "1" you can get a well-formed mathematical expression from it. For example, sequences "(())()", "()" and "(()(()))" are c... | instruction | 0 | 92,766 | 21 | 185,532 |
Yes | output | 1 | 92,766 | 21 | 185,533 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A bracketed sequence is called correct (regular) if by inserting "+" and "1" you can get a well-formed mathematical expression from it. For example, sequences "(())()", "()" and "(()(()))" are c... | instruction | 0 | 92,767 | 21 | 185,534 |
Yes | output | 1 | 92,767 | 21 | 185,535 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A bracketed sequence is called correct (regular) if by inserting "+" and "1" you can get a well-formed mathematical expression from it. For example, sequences "(())()", "()" and "(()(()))" are c... | instruction | 0 | 92,768 | 21 | 185,536 |
Yes | output | 1 | 92,768 | 21 | 185,537 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A bracketed sequence is called correct (regular) if by inserting "+" and "1" you can get a well-formed mathematical expression from it. For example, sequences "(())()", "()" and "(()(()))" are c... | instruction | 0 | 92,769 | 21 | 185,538 |
Yes | output | 1 | 92,769 | 21 | 185,539 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A bracketed sequence is called correct (regular) if by inserting "+" and "1" you can get a well-formed mathematical expression from it. For example, sequences "(())()", "()" and "(()(()))" are c... | instruction | 0 | 92,770 | 21 | 185,540 |
No | output | 1 | 92,770 | 21 | 185,541 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A bracketed sequence is called correct (regular) if by inserting "+" and "1" you can get a well-formed mathematical expression from it. For example, sequences "(())()", "()" and "(()(()))" are c... | instruction | 0 | 92,771 | 21 | 185,542 |
No | output | 1 | 92,771 | 21 | 185,543 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A bracketed sequence is called correct (regular) if by inserting "+" and "1" you can get a well-formed mathematical expression from it. For example, sequences "(())()", "()" and "(()(()))" are c... | instruction | 0 | 92,772 | 21 | 185,544 |
No | output | 1 | 92,772 | 21 | 185,545 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
A bracketed sequence is called correct (regular) if by inserting "+" and "1" you can get a well-formed mathematical expression from it. For example, sequences "(())()", "()" and "(()(()))" are c... | instruction | 0 | 92,773 | 21 | 185,546 |
No | output | 1 | 92,773 | 21 | 185,547 |
Provide a correct Python 3 solution for this coding contest problem.
You are given a string S of length N consisting of `(` and `)`. Your task is to insert some number of `(` and `)` into S to obtain a correct bracket sequence.
Here, a correct bracket sequence is defined as follows:
* `()` is a correct bracket sequen... | instruction | 0 | 98,485 | 21 | 196,970 |
"Correct Solution:
```
N = int(input())
S = input()
s = S[:]
while '()' in s:
s = s.replace('()', '')
ans = '(' * s.count(')') + S + ')' * s.count('(')
print(ans)
``` | output | 1 | 98,485 | 21 | 196,971 |
Provide a correct Python 3 solution for this coding contest problem.
You are given a string S of length N consisting of `(` and `)`. Your task is to insert some number of `(` and `)` into S to obtain a correct bracket sequence.
Here, a correct bracket sequence is defined as follows:
* `()` is a correct bracket sequen... | instruction | 0 | 98,486 | 21 | 196,972 |
"Correct Solution:
```
N=int(input())
S=input()
a=[0]
for c in S:
a.append(a[-1]+(1 if c=='(' else -1))
k=-min(a)
l=S.count('(')+k-S.count(')')
ans='('*k+S+')'*l
print(ans)
``` | output | 1 | 98,486 | 21 | 196,973 |
Provide a correct Python 3 solution for this coding contest problem.
You are given a string S of length N consisting of `(` and `)`. Your task is to insert some number of `(` and `)` into S to obtain a correct bracket sequence.
Here, a correct bracket sequence is defined as follows:
* `()` is a correct bracket sequen... | instruction | 0 | 98,487 | 21 | 196,974 |
"Correct Solution:
```
input()
t=s=input()
p,q=o="()"
while o in s:s=s.replace(o,"")
print(p*s.count(q)+t+q*s.count(p))
``` | output | 1 | 98,487 | 21 | 196,975 |
Provide a correct Python 3 solution for this coding contest problem.
You are given a string S of length N consisting of `(` and `)`. Your task is to insert some number of `(` and `)` into S to obtain a correct bracket sequence.
Here, a correct bracket sequence is defined as follows:
* `()` is a correct bracket sequen... | instruction | 0 | 98,488 | 21 | 196,976 |
"Correct Solution:
```
N = int(input())
X = input()
L, R = 0, 0
for x in X:
if x == "(":
R += 1
else:
if R == 0:
L += 1
else:
R -= 1
print(L*"("+X+R*")")
``` | output | 1 | 98,488 | 21 | 196,977 |
Provide a correct Python 3 solution for this coding contest problem.
You are given a string S of length N consisting of `(` and `)`. Your task is to insert some number of `(` and `)` into S to obtain a correct bracket sequence.
Here, a correct bracket sequence is defined as follows:
* `()` is a correct bracket sequen... | instruction | 0 | 98,489 | 21 | 196,978 |
"Correct Solution:
```
N = int(input())
S = input()
R=0;L=0
for i in range(N):
if S[i] == ')':
if L == 0:
R+=1
else:
L -= 1
else:
L += 1
Answer = '(' * R + S + ')' * L
print(Answer)
``` | output | 1 | 98,489 | 21 | 196,979 |
Provide a correct Python 3 solution for this coding contest problem.
You are given a string S of length N consisting of `(` and `)`. Your task is to insert some number of `(` and `)` into S to obtain a correct bracket sequence.
Here, a correct bracket sequence is defined as follows:
* `()` is a correct bracket sequen... | instruction | 0 | 98,490 | 21 | 196,980 |
"Correct Solution:
```
n=int(input())
s=input()
l=0
r=0
for c in s:
if c=='(':
r+=1
elif c==')':
if r>0:
r-=1
else:
l+=1
print('('*l+s+')'*r)
``` | output | 1 | 98,490 | 21 | 196,981 |
Provide a correct Python 3 solution for this coding contest problem.
You are given a string S of length N consisting of `(` and `)`. Your task is to insert some number of `(` and `)` into S to obtain a correct bracket sequence.
Here, a correct bracket sequence is defined as follows:
* `()` is a correct bracket sequen... | instruction | 0 | 98,491 | 21 | 196,982 |
"Correct Solution:
```
n=int(input())
s=input()
a=b=0
k=0
for i in range(n):
if s[i]=="(":
a+=1
else:
b+=1
if a<b:
k+=1
a+=1
s=k*("(")+s
if a>b:
s+=")"*(a-b)
print(s)
``` | output | 1 | 98,491 | 21 | 196,983 |
Provide a correct Python 3 solution for this coding contest problem.
You are given a string S of length N consisting of `(` and `)`. Your task is to insert some number of `(` and `)` into S to obtain a correct bracket sequence.
Here, a correct bracket sequence is defined as follows:
* `()` is a correct bracket sequen... | instruction | 0 | 98,492 | 21 | 196,984 |
"Correct Solution:
```
input();s=input();r=l=0
for c in s:r=max(r-1+2*(c=='('),0)
for c in s[::-1]:l=max(l-1+2*(c==')'),0)
print(l*'('+s+')'*r)
``` | output | 1 | 98,492 | 21 | 196,985 |
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 N consisting of `(` and `)`. Your task is to insert some number of `(` and `)` into S to obtain a correct bracket sequence.
Here, a correct bracket sequence is... | instruction | 0 | 98,493 | 21 | 196,986 |
Yes | output | 1 | 98,493 | 21 | 196,987 |
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 N consisting of `(` and `)`. Your task is to insert some number of `(` and `)` into S to obtain a correct bracket sequence.
Here, a correct bracket sequence is... | instruction | 0 | 98,494 | 21 | 196,988 |
Yes | output | 1 | 98,494 | 21 | 196,989 |
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 N consisting of `(` and `)`. Your task is to insert some number of `(` and `)` into S to obtain a correct bracket sequence.
Here, a correct bracket sequence is... | instruction | 0 | 98,495 | 21 | 196,990 |
Yes | output | 1 | 98,495 | 21 | 196,991 |
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 N consisting of `(` and `)`. Your task is to insert some number of `(` and `)` into S to obtain a correct bracket sequence.
Here, a correct bracket sequence is... | instruction | 0 | 98,496 | 21 | 196,992 |
Yes | output | 1 | 98,496 | 21 | 196,993 |
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 N consisting of `(` and `)`. Your task is to insert some number of `(` and `)` into S to obtain a correct bracket sequence.
Here, a correct bracket sequence is... | instruction | 0 | 98,497 | 21 | 196,994 |
No | output | 1 | 98,497 | 21 | 196,995 |
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 N consisting of `(` and `)`. Your task is to insert some number of `(` and `)` into S to obtain a correct bracket sequence.
Here, a correct bracket sequence is... | instruction | 0 | 98,498 | 21 | 196,996 |
No | output | 1 | 98,498 | 21 | 196,997 |
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 N consisting of `(` and `)`. Your task is to insert some number of `(` and `)` into S to obtain a correct bracket sequence.
Here, a correct bracket sequence is... | instruction | 0 | 98,499 | 21 | 196,998 |
No | output | 1 | 98,499 | 21 | 196,999 |
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 N consisting of `(` and `)`. Your task is to insert some number of `(` and `)` into S to obtain a correct bracket sequence.
Here, a correct bracket sequence is... | instruction | 0 | 98,500 | 21 | 197,000 |
No | output | 1 | 98,500 | 21 | 197,001 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
As you know, Vova has recently become a new shaman in the city of Ultima Thule. So, he has received the shaman knowledge about the correct bracket sequences. The shamans of Ultima Thule have bee... | instruction | 0 | 100,632 | 21 | 201,264 |
No | output | 1 | 100,632 | 21 | 201,265 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Serval soon said goodbye to Japari kindergarten, and began his life in Japari Primary School.
In his favorite math class, the teacher taught him the following interesting definitions.
A parenthesis sequence is a string, containing only cha... | instruction | 0 | 107,079 | 21 | 214,158 |
Tags: greedy, strings
Correct Solution:
```
_str = str
n, str = int(input()), list(input())
if str[0] == '?': str[0] = '('
if str[-1] == '?': str[-1] = ')'
pp, nn = n//2, n//2
for ch in str:
if ch == '(': pp -= 1
if ch == ')': nn -= 1
if n%2 == 1 or str[0] != '(' or str[-1] != ')' or pp < 0 or nn < 0:
... | output | 1 | 107,079 | 21 | 214,159 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Serval soon said goodbye to Japari kindergarten, and began his life in Japari Primary School.
In his favorite math class, the teacher taught him the following interesting definitions.
A parenthesis sequence is a string, containing only cha... | instruction | 0 | 107,080 | 21 | 214,160 |
Tags: greedy, strings
Correct Solution:
```
import sys
#comment these out later
#sys.stdin = open("in.in", "r")
#sys.stdout = open("out.out", "w")
def main():
inp = sys.stdin.read().split(); ii = 0
n = int(inp[ii]); ii += 1
s = list(inp[ii])
if n%2:
print(":(")
sys.exit()
a = n//2 - s.count("(")
b = n//2... | output | 1 | 107,080 | 21 | 214,161 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Serval soon said goodbye to Japari kindergarten, and began his life in Japari Primary School.
In his favorite math class, the teacher taught him the following interesting definitions.
A parenthesis sequence is a string, containing only cha... | instruction | 0 | 107,081 | 21 | 214,162 |
Tags: greedy, strings
Correct Solution:
```
n = int(input())
if n % 2:
print(':(')
exit(0)
s = list(input())
ans = ''
c1, c2 = s.count('('), s.count(')')
cnt90 = 0
cnt9, cnt0 = 0, 0
for i in s[:-1]:
if i == '(':
cnt90 += 1
if cnt9 + cnt90 > n // 2:
print(':(')
exit(0)... | output | 1 | 107,081 | 21 | 214,163 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Serval soon said goodbye to Japari kindergarten, and began his life in Japari Primary School.
In his favorite math class, the teacher taught him the following interesting definitions.
A parenthesis sequence is a string, containing only cha... | instruction | 0 | 107,082 | 21 | 214,164 |
Tags: greedy, strings
Correct Solution:
```
import sys
input=sys.stdin.readline
n=int(input())
a=list(input())
if n%2!=0:
print(":(")
else:
b=a.count("(")
c=a.count(")")
if b>n//2 or c>n//2:
print(":(")
else:
b=n//2-b
c=n//2-c
d=0
for i in range(n):
... | output | 1 | 107,082 | 21 | 214,165 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Serval soon said goodbye to Japari kindergarten, and began his life in Japari Primary School.
In his favorite math class, the teacher taught him the following interesting definitions.
A parenthesis sequence is a string, containing only cha... | instruction | 0 | 107,083 | 21 | 214,166 |
Tags: greedy, strings
Correct Solution:
```
from __future__ import print_function, division
from sys import stdin, exit
def no_ans():
print(":(")
exit(0)
n = int(stdin.readline())
s = [ch for ch in stdin.readline()[:n]]
if n % 2 == 1 or s[0] == ')' or s[-1] == '(':
no_ans()
s[0] = '('
s[-1] = ')'
cur_o... | output | 1 | 107,083 | 21 | 214,167 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Serval soon said goodbye to Japari kindergarten, and began his life in Japari Primary School.
In his favorite math class, the teacher taught him the following interesting definitions.
A parenthesis sequence is a string, containing only cha... | instruction | 0 | 107,084 | 21 | 214,168 |
Tags: greedy, strings
Correct Solution:
```
n = int(input())
s = input()
open = 0
closed = 0
for i in range(n):
if s[i] == '(':
open += 1
elif s[i] == ')':
closed += 1
a = n/2 - open
b = n/2 - closed
ans = ""
openct = 0
closedct = 0
can = True
if n%2 or open > n/2:
can = False
can = Fal... | output | 1 | 107,084 | 21 | 214,169 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Serval soon said goodbye to Japari kindergarten, and began his life in Japari Primary School.
In his favorite math class, the teacher taught him the following interesting definitions.
A parenthesis sequence is a string, containing only cha... | instruction | 0 | 107,085 | 21 | 214,170 |
Tags: greedy, strings
Correct Solution:
```
n = int(input())
s = [i for i in input()]
o = 0
z = 0
O = s.count('(')
Z = s.count(')')
V = s.count('?')
on = (V - (O - Z)) // 2
flag = 0
if on >= 0:
for i in range(n):
if s[i] == '(':
o += 1
if s[i] == ')':
z += 1
if s[i] =... | output | 1 | 107,085 | 21 | 214,171 |
Provide tags and a correct Python 3 solution for this coding contest problem.
Serval soon said goodbye to Japari kindergarten, and began his life in Japari Primary School.
In his favorite math class, the teacher taught him the following interesting definitions.
A parenthesis sequence is a string, containing only cha... | instruction | 0 | 107,086 | 21 | 214,172 |
Tags: greedy, strings
Correct Solution:
```
n = int(input())
s = input()
a = []
for i in range(n):
if s[i] == '?':
a.append('(')
else:
a.append(s[i])
cnt = 0
ans = 0
for i in range(n):
if a[i] == '(':
cnt+=1
else:
cnt -= 1
ans = min(ans, cnt)
for i in range(n-1, -1, ... | output | 1 | 107,086 | 21 | 214,173 |
Evaluate the correctness of the submitted Python 3 solution to the coding contest problem. Provide a "Yes" or "No" response.
Serval soon said goodbye to Japari kindergarten, and began his life in Japari Primary School.
In his favorite math class, the teacher taught him the following interesting definitions.
A parent... | instruction | 0 | 107,087 | 21 | 214,174 |
Yes | output | 1 | 107,087 | 21 | 214,175 |
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