#include <stdio.h>
#include <stdint.h>
// Complete the function
const char* is_power_of_two(uint32_t n) {
// A power of two must be greater than 0
// And (n & (n - 1)) must be 0
if (n > 0 && (n & (n - 1)) == 0) {
return "YES";
}
return "NO";
}
int main() {
uint32_t n;
if (scanf("%u", &n) != 1) return 0;
const char* result = is_power_of_two(n);
printf("%s", result);
return 0;
}