Cod sursa(job #3121906)

Utilizator BlaugranasEnal Gemaledin Blaugranas Data 16 aprilie 2023 08:20:03
Problema Cbinteractiv Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.19 kb
Raporteaza aceasta sursa 
#include<iostream>
using namespace std;
int n,l,m,k;
int main()
{
    for(cin>>n,l=1;l<=n;m=(l+n)/2,cout<<"? "<<m<<'\n',cout.flush(),cin>>k,k?n=m-1:l=m+1);
    return cout<<"! "<<l,0;
}