Submission #1003912

#	Time	Username	Problem	Language	Result	Execution time	Memory
1003912		vjudge1	Zagrade (COI20_zagrade)	C++17	0 / 100	1 ms	1112 KiB

zagrade

#include <bits/stdc++.h>

using namespace std;

vector<int> v;
stack<int> st;

int main(){
	int n,q; cin>>n>>q;
	v.resize(n+5);
	st.push(1); v[1] = 1;

	for(int i = 2; i <= n; i++){
		cout<<"? "<<st.top()<<" "<<i<<"\n"<<flush;
		int x; cin>>x;
		if(x == 0){
			v[i] = 1;
			st.push(i);
		}else{
			v[i] = 0;
			st.pop();
		}
	}

	cout<<"! ";
	for(int i = 1; i <= n; i++){
		if(v[i] == 0)cout<<")";
		else cout<<"(";
	}cout<<"\n"<<flush;

	return 0;
}

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