Cod sursa(job #3042394)

Utilizator BlaugranasEnal Gemaledin Blaugranas Data 6 aprilie 2023 09:07:30
Problema Cbinteractiv Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.2 kb
Raporteaza aceasta sursa 
#include<iostream>
using namespace std;
int n,l,r,m,x;
int main()
{
    for(cin>>n,l=1,r=n;l<=r;m=(l+r)/2,cout<<"? "<<m,cout.flush(),cin>>x,x?r=m-1:l=m+1);
	return cout<<"! "<<l,cout.flush(),0;
}