sing System;
using System.Text;

class DivisionByFive
{
    static void Main()
    {
        uint p = 0;
        Console.Write("please write down positive int a = ");
        uint a = uint.Parse(Console.ReadLine());
        Console.Write("please write down positive int b = ");
        uint b = uint.Parse(Console.ReadLine());
        if (a > b)
        {
            a = a + b;
            b = (a - b);
            a = (a - b);
        }
        for (uint i=a;i<=b;i++)
        {
            uint k = i % 5;
            if (k == 0)
            {
                p++;
            }
        }
        Console.WriteLine("the numbers between {0} and {1} that can be divided by 5 with reminder = 0, are 'p'={2}", a, b, p);

    }
}