#include <stdio.h>
#include <stdint.h>
// Complete the function
const char* is_power_of_two(uint32_t n) {
int cnt=0,i;
for(i=31;i>=0;i--)
{
if((n>>i)&1)
cnt++;
}
if(cnt==1)
return "YES";
// Your logic here
return "NO";
}
int main() {
uint32_t n;
scanf("%u", &n);
const char* result = is_power_of_two(n);
printf("%s", result);
return 0;
}