Cod sursa(job #3144594)
Utilizator | Murgoci Darius DariusM17 | Data | 9 august 2023 04:55:46 |
---|---|---|---|
Problema | Cbinteractiv | Scor | 30 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva educationala | Marime | 0.46 kb |
#include <bits/stdc++.h>
using namespace std;
#define FAST ios_base::sync_with_stdio(0), cin.tie(0),cout.tie(0) ;
int n,st,dr,mij ;
int main()
{
cin>>n ;
st=1,dr=n ;
while(st<dr)
{
mij=(st+dr)>>1 ;
cout<<"? "<<mij<<'\n' ;
cout.flush() ;
cin>>n ;
if(n==-1) return 0;
else if(n==1) dr=mij-1 ;
else st=mij+1 ;
}
cout<<"! "<<dr<<'\n';
cout.flush() ;
return 0 ;
}