#include "grader.h"
#include<bits/stdc++.h>
using namespace std;
int HC(int N){
int r = 1 , l = N;
while(r < l)
{
Guess(l);
int x = Guess(l);
int m = (l+r) / 2;
if(x == 0)
{
return m;
}
else if (x == 1)
{
return l = r - (r-l+1)/ 2 + 1;
}
else
{
return r = l + (r-l+1)/2 - 1 ;
}
}
return l;
}
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