Submission #1004067

#	Time	Username	Problem	Language	Result	Execution time	Memory
1004067		vjudge1	Zagrade (COI20_zagrade)	C++17	100 / 100	606 ms	1752 KiB

zagrade

#include <bits/stdc++.h>
using namespace std;

int main(){
    int n, q;
    cin >> n >> q;

    vector<int> vec;
    vec.push_back(1);

    char ans[n + 1];
    for (int i = 2; i <= n; i ++){
        if (vec.size() == 0){
            vec.push_back(i);
            continue;
        }

        int l = vec.back();
        cout << "? " << l << " " << i << endl;
        
        bool regular;
        cin >> regular;

        if (regular){
            ans[l] = '(';
            ans[i] = ')';
            vec.pop_back();
            continue;
        }

        vec.push_back(i);
    }

    int x = vec.size();
    x /= 2;

    for (int i = 0; i < x; i ++){
        int last = vec.back();
        ans[last] = '(';
        vec.pop_back();
    }

    for (int i = 0; i < x; i ++){
        int last = vec.back();
        ans[last] = ')';
        vec.pop_back();
    }

    cout << "! ";
    for (int i = 1; i <= n; i ++)
        cout << ans[i];
    cout << endl;
}

• Subtask 1: 14 / 14
• Subtask 2: 7 / 7
• Subtask 3: 57 / 57
• Subtask 4: 22 / 22