#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 index = 0; index < 32; index++) {
if ((n >> index) & 1) {
counter++;
}
}
if (counter == 1) {
return "YES";
} else {
return "NO";
}
}
int main() {
uint32_t n;
scanf("%u", &n);
const char* result = is_power_of_two(n);
printf("%s", result);
return 0;
}