제출 #1192191

#제출 시각아이디문제언어결과실행 시간메모리
1192191prideliqueeeGuess the number (BOI20_guess)C++20
0 / 100
0 ms412 KiB
#include<bits/stdc++.h> using namespace std; #define int long long signed main() { int n; cin>>n; int l=1,r=n; while(l<r) { int mid=(l+r)/2; cout<<"? "<<mid<<endl; int x; cin>>x; if(x==0) { cout<<"= "<<mid; return 0; } if(x==1) { r=mid-1; } else if(x==-1) { l=mid+1; } } }
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