oj.uz

답안 #48087

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
48087 2018-05-10T04:25:45 Z Extazy 괄호 문자열 (CEOI16_match) C++17
37 / 100
 2000 ms 24792 KB 
#include <bits/stdc++.h>
#define endl '\n'

using namespace std;

const int N = 100007;

int n;
char a[N],ans[N];

bool can(int l, int r) {
  stack < char > s;
  int i;

  for(i=l;i<=r;i++) {
    if(!s.empty() && s.top()==a[i]) s.pop();
    else s.push(a[i]);
  }

  return s.empty();
}

void solve(int l, int r) {
  if(l>r) return;
  if(a[l]==a[r]) {
    ans[l]='(';
    ans[r]=')';
    solve(l+1,r-1);
    return;
  }

  int i,mid=(l+r)/2;
  stack < int > s;

  for(i=r;i>=l;i--) {
    if(!s.empty() && s.top()==a[i]) s.pop();
    else s.push(a[i]);

    if(s.empty() && a[i-1]==a[l]) {
      ans[l]='(';
      ans[i-1]=')';
      solve(l+1,i-2);
      solve(i,r);
      return;
    }
  }
}

int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  int i;

  scanf("%s", a+1);
  n=strlen(a+1);

  if(!can(1,n)) {
    printf("-1\n");
    return 0;
  }
    
  solve(1,n);
  for(i=1;i<=n;i++) {
    printf("%c", ans[i]);
  }
  printf("\n");

  return 0;
}

Compilation message

match.cpp: In function 'void solve(int, int)':
match.cpp:32:9: warning: unused variable 'mid' [-Wunused-variable]
   int i,mid=(l+r)/2;
         ^~~
match.cpp: In function 'int main()':
match.cpp:54:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%s", a+1);
   ~~~~~^~~~~~~~~~~

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 572 KB Output is correct

Subtask #2
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 572 KB Output is correct
4 Correct 2 ms 572 KB Output is correct
5 Correct 2 ms 572 KB Output is correct
6 Correct 2 ms 696 KB Output is correct
7 Correct 2 ms 720 KB Output is correct

Subtask #3
0 / 63.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 572 KB Output is correct
4 Correct 2 ms 572 KB Output is correct
5 Correct 2 ms 572 KB Output is correct
6 Correct 2 ms 696 KB Output is correct
7 Correct 2 ms 720 KB Output is correct
8 Correct 4 ms 724 KB Output is correct
9 Correct 12 ms 1548 KB Output is correct
10 Correct 6 ms 1548 KB Output is correct
11 Correct 4 ms 1548 KB Output is correct
12 Correct 91 ms 5696 KB Output is correct
13 Correct 44 ms 5696 KB Output is correct
14 Correct 585 ms 15460 KB Output is correct
15 Correct 14 ms 15460 KB Output is correct
16 Correct 13 ms 15460 KB Output is correct
17 Correct 77 ms 15460 KB Output is correct
18 Correct 15 ms 15460 KB Output is correct
19 Correct 968 ms 15460 KB Output is correct
20 Correct 401 ms 15460 KB Output is correct
21 Execution timed out 2021 ms 24792 KB Time limit exceeded