Submission #1111849

#	Time	Username	Problem	Language	Result	Execution time	Memory
1111849		LM1	Zagrade (COI20_zagrade)	C++14	100 / 100	1934 ms	1592 KiB

zagrade

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int,int>
#define pb push_back
#define ff first
#define ss second
int main(){
	ios_base::sync_with_stdio(NULL);cin.tie(NULL);
	int n,q,ok;cin>>n>>q;
	char ans[n+1];
	stack<int>st;
	for(int i=1;i<=n;i++){
		if(st.size()==0){
			st.push(i);
			continue;
		}
		cout<<"? "<<st.top()<<" "<<i<<endl;
		cin>>ok;
		if(ok){
			ans[st.top()]='(';
			ans[i]=')';
			st.pop();
		}
		else{
			st.push(i);
		}
	}
	int n1=st.size();
	for(int i=0;i<n1/2;i++){
		ans[st.top()]='(';
		st.pop();
	}
	while(st.size()){
		ans[st.top()]=')';
		st.pop();
	}
	cout<<"! ";
	for(int i=1;i<=n;i++)cout<<ans[i];
	cout<<endl;
}
/*
((()))
*/

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