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


/**************************************************************
	Problem: 1640
	User: wqc123
	Language: C++
	Result: Accepted
	Time:13 ms
	Memory:2072 kb
****************************************************************/