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Submission #339698

# Submission time Handle Problem Language Result Execution time Memory
339698 2020-12-26T00:04:19 Z couplefire Match (CEOI16_match) C++17
100 / 100
 18 ms 12012 KB 
#include <bits/stdc++.h>
using namespace std;
int n; string s; string ans;
int dp[100005][26];
bool solve(int l, int r){
    if(l == r+1) return 1;
    if(dp[r][s[l]-'a'] < l) return false;
    int a = dp[r][s[l]-'a'];
    ans[l] = '(', ans[a-1] = ')';
    return solve(l+1, a-2) && solve(a, r);
}
int main(){
    ios_base::sync_with_stdio(false); cin.tie(0);
    cin >> s; n = s.length(); ans.resize(n);
    for(int i = 0; i<n; i++){
        for(int j = 0; j<26; j++){
            dp[i][j] = -1;
            if(s[i]-'a' == j) dp[i][j] = i+1;
            if(i >= 1 && dp[i-1][s[i]-'a']-2 >= 0) dp[i][j] = max(dp[i][j], dp[dp[i-1][s[i]-'a']-2][j]);
        }
    }
    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 0 ms 364 KB Output is correct
3 Correct 0 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 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 1 ms 492 KB Output is correct
5 Correct 1 ms 492 KB Output is correct
6 Correct 1 ms 492 KB Output is correct
7 Correct 1 ms 492 KB Output is correct

Subtask #3
63.0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 0 ms 364 KB Output is correct
3 Correct 0 ms 364 KB Output is correct
4 Correct 1 ms 492 KB Output is correct
5 Correct 1 ms 492 KB Output is correct
6 Correct 1 ms 492 KB Output is correct
7 Correct 1 ms 492 KB Output is correct
8 Correct 2 ms 1024 KB Output is correct
9 Correct 2 ms 1132 KB Output is correct
10 Correct 2 ms 1132 KB Output is correct
11 Correct 2 ms 1260 KB Output is correct
12 Correct 10 ms 7404 KB Output is correct
13 Correct 11 ms 8044 KB Output is correct
14 Correct 12 ms 8812 KB Output is correct
15 Correct 16 ms 10220 KB Output is correct
16 Correct 15 ms 10220 KB Output is correct
17 Correct 15 ms 10732 KB Output is correct
18 Correct 17 ms 10476 KB Output is correct
19 Correct 17 ms 11244 KB Output is correct
20 Correct 11 ms 7532 KB Output is correct
21 Correct 18 ms 12012 KB Output is correct