Submission #222989

#	Time	Username	Problem	Language	Result	Execution time	Memory
222989		Minnakhmetov	Match (CEOI16_match)	C++14	37 / 100	2097 ms	608 KiB

match

#include <bits/stdc++.h>
using namespace std;
 
#define ll long long
#define all(aaa) aaa.begin(), aaa.end()

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

    string s;
    cin >> s;

    int n = s.size();

    vector<char> stk;

    string ans;

    for (int i = 0; i < n; i++) {
        if (stk.empty() || stk.back() != s[i]) {
            stk.push_back(s[i]);
            ans.push_back('(');
        }
        else {
            vector<char> stk_cp = stk;
            stk_cp.push_back(s[i]);

            for (int j = i + 1; j < n; j++) {
                if (stk_cp.empty() || stk_cp.back() != s[j]) {
                    stk_cp.push_back(s[j]);
                }
                else {
                    stk_cp.pop_back();
                }
            }
            if (stk_cp.empty()) {
                stk.push_back(s[i]);
                ans.push_back('(');
            }
            else {
                stk.pop_back();
                ans.push_back(')');
            }
        }
    }

    if (stk.empty()) {
        cout << ans << "\n";
    }
    else {
        cout << "-1\n";
    }
 
    return 0;
}

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