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Submission #339688

# Submission time Handle Problem Language Result Execution time Memory
339688 2020-12-25T23:29:02 Z couplefire Match (CEOI16_match) C++17
37 / 100
 2000 ms 33704 KB 
#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;
}

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 508 KB Output is correct
6 Correct 3 ms 904 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 508 KB Output is correct
6 Correct 3 ms 904 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 2060 KB Output is correct
10 Correct 24 ms 1536 KB Output is correct
11 Correct 35 ms 3180 KB Output is correct
12 Correct 1461 ms 27484 KB Output is correct
13 Correct 1596 ms 33704 KB Output is correct
14 Execution timed out 2082 ms 29784 KB Time limit exceeded
15 Halted 0 ms 0 KB -