usaco-practice/codeforces/Watermelon/index.cpp

#include <iostream>
using namespace std;

int main() {
  int n;
  int i;
  cin >> n;
  i = n - 2;
  if (i % 2 == 0 && i > 0) {
    cout << "YES" << endl;
  } else {
    cout << "NO" << endl;
  }
}