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

/**************************************************************
	Problem: 1640
	User: ccf
	Language: C++
	Result: Accepted
	Time:3 ms
	Memory:2072 kb
****************************************************************/