using System;

using System.Collections.Generic;

public class Program

{

    public void Main()

    {

            Console.WriteLine(f(new List<int>{1,  1,  4,  2,  0}));

            Console.WriteLine(f(new List<int>{2,  2,  2,  2,  2}));

            Console.WriteLine(f(new List<int>{0,  6,  0,  6,  0}));

            Console.WriteLine(f(new List<int>{12, 5,  3,  2,  1}));

            Console.WriteLine(f(new List<int>{1,  14, 14, 3,  2}));

            Console.WriteLine(f(new List<int>{0,  0,  1,  0,  50}));

    }

    int f(List<int>p){p.Sort();p[3]--;p[4]--;return p[2]-->0?1+f(p):0;}

}