题解 | #小乐乐排电梯#

using System;
public class Program {
    public static void Main() {
        int peoplenum = int.Parse(Console.ReadLine());
        if((peoplenum/12)>0)
        {
            int i = peoplenum/12;
            Console.WriteLine(i*4+2);
        }
        else
        {
            Console.WriteLine(2);
        }
    }
}