oj.uz

Submission #339689

# Submission time Handle Problem Language Result Execution time Memory
339689 2020-12-25T23:30:05 Z couplefire Match (CEOI16_match) C++17
37 / 100
 2000 ms 33864 KB 
#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
#include <bits/stdc++.h>
using namespace std;

int n; string s;
string ans;

bool solve(int l, int r){
    if(l == r+1) return 1;
    stack<int> st; int good = -1;
    for(int i = l; i<=r; i++){
        if(!st.empty() && st.top() == s[i]-'a') st.pop();
        else st.push(s[i]-'a');
        if(st.empty() && s[i] == s[l]) good = i;
    }
    if(good == -1) return false;
    ans[l] = '('; ans[good] = ')';
    return solve(l+1, good-1)&&solve(good+1, r);
}

int main(){
    // freopen("match.in", "r", stdin);
    // freopen("match.out", "w", stdout);
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cin >> s; n = s.length(); ans.resize(n);
    if(!solve(0, n-1)) cout << -1 << endl;
    else cout << ans << endl;
}

Compilation message

match.cpp:2: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
    2 | #pragma GCC optimization ("O3")
      | 
match.cpp:3: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
    3 | #pragma GCC optimization ("unroll-loops")
      |

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct

Subtask #2
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 492 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 3 ms 876 KB Output is correct
7 Correct 2 ms 620 KB Output is correct

Subtask #3
0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 492 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 3 ms 876 KB Output is correct
7 Correct 2 ms 620 KB Output is correct
8 Correct 4 ms 492 KB Output is correct
9 Correct 33 ms 2028 KB Output is correct
10 Correct 21 ms 1644 KB Output is correct
11 Correct 34 ms 3180 KB Output is correct
12 Correct 1366 ms 27324 KB Output is correct
13 Correct 1509 ms 33864 KB Output is correct
14 Execution timed out 2076 ms 30132 KB Time limit exceeded
15 Halted 0 ms 0 KB -