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