#include "grader.h"
#include "bits/stdc++.h"
using namespace std;
#define fi first
#define se second
#define ll long long
#define dbg(v) cerr<<#v<<" = "<<v<<'\n'
#define vi vector<int>
#define vl vector <ll>
#define pii pair<int,int>
#define mp make_pair
#define db long double
#define pb push_back
#define all(s) s.begin(),s.end()
template < class T > T smin(T &a,T b) {if (a > b) a = b;return a;}
template < class T > T smax(T &a,T b) {if (a < b) a = b;return a;}
int HC(int N){
int l = 1,r = N;
while (l < r) {
Guess(l);
int cnt = Guess(r);
if (!cnt)
return (l + r) / 2;
if (cnt == 1) {
l = (l + r + 2) / 2;
} else {
r = (l + r - 1) / 2;
}
}
return l;
}
