#include<bits/stdc++.h>
using namespace std;
int main()
{
	int a;
	cin>>a;
	if(a%2==0){
		cout<<"yes";
	}else{
		cout<<"";
	}
	
	return 0;
}
/**************************************************************
	Problem: 1640
	User: admin
	Language: C++
	Result: Accepted
	Time:5 ms
	Memory:2072 kb
****************************************************************/