using System;
class P
{
    static void Main()
    {
        int l = int.Parse(Console.ReadLine());
        int m = int.Parse(Console.ReadLine());
        int n = int.Parse(Console.ReadLine());
        int s = (100 * l + 25 * m + 1 * n) % 1000;
        l = 0;
        m = 0;
        n = 0;
        while (0 < s)
        {
            if (100 <= s)
            {
                s -= 100;
                l++;
            }
            else if (25 <= s)
            {
                s -= 25;
                m++;
            }
            else
            {
                s--;
                n++;
            }
        }
        Console.WriteLine(l + m + n);
    }
}