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

/**************************************************************
	Problem: 1640
	User: lyy002
	Language: C++
	Result: Accepted
	Time:12 ms
	Memory:2072 kb
****************************************************************/