#include <bits/stdc++.h> 
using namespace std;
int main() {
	int a;
	cin>>a;
	if(a%2==0) 	cout<<"yes"; 
   
}
/**************************************************************
	Problem: 1640
	User: zhuangwenya
	Language: C++
	Result: Accepted
	Time:4 ms
	Memory:2072 kb
****************************************************************/