#include <stdio.h>
#include <stdint.h>
// Complete the function
const char* is_power_of_two(uint32_t n) {
// Your logic here
if (n == 0) {return "NO";}
while(n % 2 == 0) {
n /= 2;
}
return (n == 1) ? "YES" : "NO";
}
int main() {
uint32_t n;
scanf("%u", &n);
const char* result = is_power_of_two(n);
printf("%s", result);
return 0;
}