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