Submission #374554

#	Time	Username	Problem	Language	Result	Execution time	Memory
374554		Alex_tz307	Zagrade (COI20_zagrade)	C++17	71 / 100	999 ms	800 KiB

zagrade

#include <bits/stdc++.h>

using namespace std;

bool query(const int &i, const int &j) {
    cout << "? " << i + 1 << ' ' << j + 1 << endl;
    bool ans;
    cin >> ans;
    return ans;
}

int main() {
    int N, Q;
    cin >> N >> Q;
    string sol;
    sol.resize(N);
    stack<int> S;
    for(int i = 0; i < N; ++i) {
        if(S.empty()) {
            S.emplace(i);
            sol[i] = '(';
            continue;
        }
        bool ans = query(S.top(), i);
        if(ans) {
            sol[i] = ')';
            S.pop();
        }
        else {
            sol[i] = '(';
            S.emplace(i);
        }
    }
    cout << "! " << sol << endl;
}

• Subtask 1: 14 / 14
• Subtask 2: 0 / 7
• Subtask 3: 57 / 57
• Subtask 4: 0 / 22