Submission #773570

#	Time	Username	Problem	Language	Result	Execution time	Memory
773570		vjudge1	Zagrade (COI20_zagrade)	C++17	0 / 100	1 ms	208 KiB

zagrade

#include<bits/stdc++.h>
using namespace std;
#define lalala ios_base::sync_with_stdio(false);cin.tie(NULL);
//#define endl "\n"
#define ll long long
#define N 200005
#define pb push_back

int main(){
	lalala;
	int n,q;cin>>n>>q;
	stack<int> s;
	char str[n+1];
	s.push(1);
	str[1]='(';
	for(int i=2;i<=n;i++){
		if(s.size()){
			int a=s.top();
			cout<<"? "<<a<<" "<<i<<endl;
			int x;cin>>x;
			if(x==1){
				str[i]=')';
				s.pop();
			}
			else{
				str[i]='(';
				s.push(i);
			}
		}
		else{
			s.push(i);
			str[i]='(';
			continue;
		}
	}
	for(int i=1;i<=n;i++)cout<<str[i];
}

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