#include <stdio.h>
#include <stdint.h>
// Complete the function
const char* is_power_of_two(uint32_t n) {
// 1000 1000 -> 1000 0111 (doesn't work)
// 1000 0000 -> 0111 1111 (does)
// 0001 0000 -> 0000 1111 (does)
// edge case of 0:
if (n == 0) return "NO";
if ((n & (n - 1)) == 0) return "YES";
return "NO";
}
int main() {
uint32_t n;
scanf("%u", &n);
const char* result = is_power_of_two(n);
printf("%s", result);
return 0;
}