This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include "grader.h"
#include<bits/stdc++.h>
using namespace std;
int HC(int N){
int left= 1,right = N;
int a;
while (left<=right){
int mid = left + (right-left)/2;
a=Guess(mid);
a=Guess(mid+1);
if (a==1)left=mid+1;
else {
a=Guess(mid-1);
if (a==0)return mid;
else if (a==1)
right = mid-1;
}
}
return left;
}
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