#include<bits/stdc++.h>
using namespace std;
int main()
{
	int a;
	cin>>a;
	if(a%2==0)
	{
		cout<<"yes";
	}
	return 0;
}

#include<bits/stdc++.h> using namespace std; int main() { int a; cin>>a; if(a%2==0)cout<<"yes"; return 0; }