#include <stdio.h>
#include <stdint.h>
const char* is_power_of_two(uint32_t n)
{
// Your logic here
if( (n>0) && ((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;
}