#include <stdio.h>
#include <stdint.h>
const char* is_power_of_two(uint32_t n) {
if((n%2==0 )|(n==1) && (n!=0) ){
return "YES\n";
}
return "NO";
}
int main() {
uint32_t n;
scanf("%u", &n);
const char* result = is_power_of_two(n);
printf("%s", result);
return 0;
}