#include <stdio.h>
#include <stdint.h>
// Complete the function
const char* is_power_of_two(uint32_t n) {
// Your logic here
const char* str = "NO";
uint8_t count = 0;
for(uint8_t loop = 0; loop < 32; loop++){
if(n >> loop & 1){
count++;
if(count == 1){
str = "YES";
}
if(count > 1){
str = "NO";
break;
}
}
}
return str;
}
int main() {
uint32_t n;
scanf("%u", &n);
const char* result = is_power_of_two(n);
printf("%s", result);
return 0;
}