#include<bits/stdc++.h>
using namespace std;
int main(){
	int a;
	cin>>a;
	if(a%2==0) {
	cout<<"y e s";
}if(a%2!=0){cout<<"n o";
}
}
/**************************************************************
	Problem: 1033
	User: sucongyi
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/