using System;

public class Hello
{
    public static void Main()
    {
        var c0 = new int[] { 25,4,10};
        var c = new int[3];
        for (int i = 0; i < 3; i++) c[i] = int.Parse(Console.ReadLine().Trim());
        Array.Reverse(c);
        var ans = 0;
        for (int i = 0; i < 3; i++)
        {
            var w = c[i] % c0[i];
            var w2 = c[i] / c0[i];
            ans += w;
            if (i + 1 >= 3) break;
            c[i + 1] += w2;
        }
        Console.WriteLine(ans);
    }
}