Cod sursa(job #2768942)

Utilizator BlaugranasEnal Gemaledin Blaugranas Data 12 august 2021 18:18:30
Problema Cbinteractiv Scor 100
Compilator c-64 Status done
Runda Arhiva educationala Marime 0.27 kb
Raporteaza aceasta sursa 
#include<stdio.h>
int d,s,o,m;
int main()
{
    for(scanf("%d",&d),s=1;s<=d;) {
        m=(s+d)>>1,printf("? %d\n",m),fflush(stdout),scanf("%d",&o);
        if(!o)
            s=m+1;
        else
            d=m-1;
    }
    printf("! %d",s),
    fflush(stdout);
}