Submission #1152366

#	Time	Username	Problem	Language	Result	Execution time	Memory
1152366		gelastropod	Zagrade (COI20_zagrade)	C++20	71 / 100	230 ms	844 KiB

zagrade

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

signed main() {
	int N, Q, x;
	cin >> N >> Q;
	stack<int> stk;
	stk.push(-1);
	stk.push(0);
	vector<bool> close(N, false);
	for (int i = 1; i < N; i++) {
		if (stk.top() == -1) {
			stk.push(i);
			continue;
		}
		cout << "? " << stk.top() + 1 << ' ' << i + 1 << endl;
		cin >> x;
		if (x) {
			close[i] = true;
			stk.pop();
		}
		else
			stk.push(i);
	}
	cout << "! ";
	for (auto i : close)
		cout << (i ? ')' : '(');
	cout << endl;
}

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