/*
* 瞬间判断2的幂
* coder:QPZ
* time:2014-12-01
*/
#include <iostream>
using namespace std;
int main(void)
{
int n;
cin>>n;
if(!(n&(n-1))){
cout<<"yes!";
}else{
cout<<"no!";
}
return 0;
}
/*
* 瞬间判断2的幂
* coder:QPZ
* time:2014-12-01
*/
#include <iostream>
using namespace std;
int main(void)
{
int n;
cin>>n;
if(!(n&(n-1))){
cout<<"yes!";
}else{
cout<<"no!";
}
return 0;
}