Cod sursa(job #2905420)

Utilizator BlaugranasEnal Gemaledin Blaugranas Data 21 mai 2022 14:23:54
Problema Cbinteractiv Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.22 kb
Raporteaza aceasta sursa 
#include<cstdio>
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),!o?s=m+1:d=m-1;
    printf("! %d",s),fflush(stdout);
    return 0;
}