#include <bits/stdc++.h> 
using namespace std;
int main() {
    int a;
    cin>>a;
    if(a%2==0)  cout<<"yes"; 
}
/**************************************************************
	Problem: 1640
	User: chenmingyu
	Language: C++
	Result: Accepted
	Time:5 ms
	Memory:2072 kb
****************************************************************/