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


	return 0;
}

/**************************************************************
	Problem: 1640
	User: 21A
	Language: C++
	Result: Accepted
	Time:4 ms
	Memory:2072 kb
****************************************************************/