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