제출 #930502

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
930502		UmairAhmadMirza	Colors (BOI20_colors)	C++14	0 / 100	0 ms	344 KiB

Colors

// Online C++ compiler to run C++ program online
#include <bits/stdc++.h>
using namespace std;
int main() {
    int n;
    cin>>n;
    if(n==1){
        cout<<"= "<<1<<endl;
        return 0;
    }
    int low=0,high=n;
    while(high-low>1){
        int mid=(high+low)/2;
        bool rec=0;
        cout<<"? "<<1<<endl;
        cin>>rec;
        cout<<"? "<<1+mid<<endl;
        cin>>rec;
        if(rec)
            high=mid;
        else
            low=mid;
    }
    cout<<"= "<<high<<endl;
    return 0;
}

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