#include <bits/stdc++.h>
using namespace std;
int nextInt() {
  int x = 0, p = 1;
  char c;
  do {
    c = getchar();
  } while (c <= 32);
  if (c == '-') {
    p = -1;
    c = getchar();
  }
  while (c >= '0' && c <= '9') {
    x = x * 10 + c - '0';
    c = getchar();
  }
  return x * p;
}
long long nextLong() {
  long long x = 0, p = 1;
  char c;
  do {
    c = getchar();
  } while (c <= 32);
  if (c == '-') {
    p = -1;
    c = getchar();
  }
  while (c >= '0' && c <= '9') {
    x = x * 10 + c - '0';
    c = getchar();
  }
  return x * p;
}
const int MAXN = 2e3;
int n, q, i, a[MAXN];
int main() {
  n = nextInt();
  puts(n & (n - 1) ? "NO" : "YES");
  return 0;
}
