Checking if a Number is a Power of 2 using C++

#include <bits/stdc++.h>

using namespace std;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n;
    cin >> n;
    bool checker = n && (!(n & (n - 1)));
    cout << (checker ? "YES" : "NO") << '\n';
    return 0;
}