#include "grader.h"
#include <bits/stdc++.h>
#define all(v) v.begin(), v.end()
#define chmax(x, v) x = max(x, v)
#define chmin(x, v) x = min(x, v)
#define pb push_back
#define pii pair<int, int>
#define sz(x) (int)x.size()
#define x first
#define y second
#define int long long
using namespace std;
int HC(int N){
int l = 1, r = N, prev = 1;
int ans = Guess(1);
while (r > l){
int mid = (l + r)/2;
int delta = prev - mid;
int mtn = mid - delta;
ans = Guess(mtn);
if ((ans >= 0)^(prev > mtn))
l = mid;
else
r = mid - 1;
}
return l;
}
Compilation message
/usr/bin/ld: /tmp/ccn3Fz90.o: in function `main':
grader.cpp:(.text.startup+0x1ba): undefined reference to `HC(int)'
collect2: error: ld returned 1 exit status
