Submission #367282

#	Time	Username	Problem	Language	Result	Execution time	Memory
367282		MODDI	Guess the number (BOI20_guess)	C++14	100 / 100	1 ms	512 KiB

Guess

#include <bits/stdc++.h>
using namespace std;
int main(){
	int n;
	cin>>n;
	int l = 1, r = n;
	while(l <= r){
		int mid = l + (r - l ) /2, check;
		cout<<"? "<<mid;
		cout<<endl;
		cin>>check;
		if(check == -1){
			l = mid + 1;
		}
		else if(check == 1){
			r = mid - 1;
		}
		else{
			cout<<"= "<<mid<<endl;
			return 0;
		}
	}
}

• Subtask 1: 29 / 29
• Subtask 2: 71 / 71