Submission #501175

#	Time	Username	Problem	Language	Result	Execution time	Memory
501175		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 ans=(l+r)/2;
	while(l<=r){
		int mid=(l+r)/2;
		cout<<"?"<<mid<<endl;
		int is_noticed;
		cin>>is_noticed;
		if(is_noticed){
			l=mid;
			ans=min(ans,mid);
		}
		else{
			r=mid-1;
		}
	}
	cout<<ans<<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;
}

• Subtask 1: 0 / 9
• Subtask 2: 0 / 13
• Subtask 3: 0 / 21
• Subtask 4: 0 / 24
• Subtask 5: 0 / 33