#include<iostream>
#include<string>
#include<functional>
using namespace std;
int main(){
	int n;
	cin>>n;
	bool p=n!=string("#").size();
	for(int i=string("##").size();i<n;i=plus()(i,string("#").size()))
		if(n%i==string().size())
			p=false;
	cout<<(p?"YES":"NO")<<endl;
}