제출 #501241

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
501241		akshtsinghania	Colors (BOI20_colors)	C++14	0 / 100	1 ms	200 KiB

Colors

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


#define int long long
#define N "\n";


void solve(){
	int n;
	cin>>n;
	int l=1,r=n;
	int min_diff=n;
	int previous=1;
	int q=0;
	cout<<"? "<<1<<endl;
	int t;cin>>t;
	while(l<=r){
		int mid=(l+r)/2;
		cout<<"? "<<previous+mid<<endl;
		int detect;
		cin>>detect;
		if(detect){
			r=mid-1;
			min_diff=min(min_diff,mid);
		}
		else{
			l=mid+1;
		}
		previous=mid;
		q++;
	}
	cout<<"= "<<min_diff<<endl;
}


signed main(){
	cout.tie(NULL);
	cin.tie(NULL);
	ios_base::sync_with_stdio(NULL);
	int t=1;
	// cin>>t;
	while(t--)solve();
	return 0;
}

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