Submission #1117723

#	Time	Username	Problem	Language	Result	Execution time	Memory
1117723		vjudge1	Match (CEOI16_match)	C++17	10 / 100	112 ms	336 KiB

match

#include <bits/stdc++.h>

// #pragma GCC optimize("Ofast,no-stack-protector,unroll-loops")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
// #define int long long
#define ll long long
#define pii pair<int, int>
#define all(v) v.begin(), v.end()
using namespace std;
const int oo = 1e9 + 9;
const int MAX = 4e5 + 5, LOGMAX = 20, B = 441, MOD = 998244353;

void solve(){
    string s; cin >> s;
    int n = s.size();
    reverse(all(s));
    for(int mask = (1 << n) - 1; mask >= 0; mask--){
        stack<int> st;
        bool b = 1;
        for(int i = n - 1; i >= 0; i--){
            if((1 << i) & mask) st.push(i);
            else{
                if(st.empty() || s[st.top()] != s[i]){
                    b = 0;
                    break;
                }
                st.pop();
            }
        }
        if(st.size()) b = 0;
        if(b){
            string ans = "";
            for(int i = n - 1; i >= 0; i--){
                if((1 << i) & mask) ans += '(';
                else ans += ')';
            }
            cout << ans << '\n';
            return;
        }
    }   
    cout << "-1\n"; 
}   

signed main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int t = 1;
    // cin >> t;
    while(t--) solve();
}

• Subtask 1: 10 / 10
• Subtask 2: 0 / 27
• Subtask 3: 0 / 63