Cod sursa(job #3042400)

Utilizator BlaugranasEnal Gemaledin Blaugranas Data 6 aprilie 2023 09:19:42
Problema Cbinteractiv Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.21 kb
Raporteaza aceasta sursa 
#include<iostream>
using namespace std;
int n,l,r,m;
int main()
{
    for(cin>>n,l=1,r=n;l<r;m=(l+r)/2,cout<<"? "<<m<<'\n',cout.flush(),cin>>n,n?r=m:l=m+1);
	return cout<<"! "<<l<<'\n',cout.flush(),0;
}