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

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