using System;

using System.Linq;

public class Program

{

    static void Sum(int[] array, int index, int sum)

    {

        if(index < 0)

        {

            Console.WriteLine(sum);

            return;

        }

        if((array[index]) % 5 == 0)

        {

            sum += (array[index]);

        }

        Sum(array, index - 1, sum);

    }

    public static void Main()

    {

        int[] array = Console.ReadLine().Split(' ').Select(int.Parse).ToArray();

        Sum(array, array.Length - 1, 0);

    }

}