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

/**************************************************************
	Problem: 1640
	User: yangjunwen
	Language: C++
	Result: Accepted
	Time:4 ms
	Memory:2072 kb
****************************************************************/