#include <stdio.h>
#include <stdint.h>
// Complete the function
const char* is_power_of_two(uint32_t n) {
// Your logic here
int counter = 0;
for(int i=0;i<32;i++) {
if(n & (1<<i)) counter++;
if(counter == 2) return "NO";
}
if(counter == 0) return "NO";
return "YES";
}
int main() {
uint32_t n;
scanf("%u", &n);
const char* result = is_power_of_two(n);
printf("%s", result);
return 0;
}