Submission #1206410

#	Time	Username	Problem	Language	Result	Execution time	Memory
1206410		Captain_Georgia	Zagrade (COI20_zagrade)	C++20	71 / 100	236 ms	876 KiB

zagrade

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

typedef long long ll;

int32_t main () {

    ios_base::sync_with_stdio(0); 
    cin.tie(0); 
    cout.tie(0); 

    int N, Q;
    cin >> N >> Q;

    auto ask = [&](int a, int b) -> int {
        assert(Q --);
        cout << "? " << a << " " << b << endl;
        int res;
        cin >> res;
        return res;
    };
    string S;
    vector<int> st;
    for (int i = 1;i <= N;i ++) {
        if (st.size() == 0) {
            st.push_back(i);
            S += '(';
        } else if (ask(st.back(), i) == 1) {
            st.pop_back();
            S += ')';
        } else {
            st.push_back(i);
            S += '(';
        }
    }
    cout << "! " << S << endl;
}

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