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