#include <iostream>
#include <string>
using namespace std;

int main() {
    string num;
    cin >> num;

    // 判断最后一位数字是否能被2整除
    if ((num[num.length() - 1] - '0') % 2 == 0) {
        cout << "YES";
    } else {
        cout << "NO";
    }

    return 0;
}