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