#include<bits/stdc++.h>
using namespace std;
int main(){
	int a;
	cin>>a;
	if(a%2==0) 
		cout<<"yes"<<endl;
	if(a%2!=0) 
		cout<<" "<<endl;
	
}
/**************************************************************
	Problem: 1640
	User: toughuatao1
	Language: C++
	Result: Accepted
	Time:3 ms
	Memory:2072 kb
****************************************************************/