#include <stdio.h>
#include <stdint.h>
// Complete the function
const char* is_power_of_two(uint32_t n) {
// Your logic
uint32_t count =0;
for (int i=0; i< 32 ; i++)
{
if ((( n >>i) & 0x01) ==1) count +=1;
}
return ( count ==1) ? ("YES"): ("NO");
}
int main() {
uint32_t n;
scanf("%u", &n);
const char* result = is_power_of_two(n);
printf("%s", result);
return 0;
}