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