/*
 * Author: Tsvetomir Nikolov
 * Email: cvetomir.nikolov@gmail.com
 *
 * Task 4: Write a program that reads two positive integer numbers and prints
 * how many numbers p exist between them such that the reminder of the division
 * by 5 is 0 (inclusive).
 *
 */

using System;

namespace DivisionBy5
{
    class DivisionBy5
    {
        static void Main()
        {
            int minValue;
            do
            {
                Console.Write("Insert min range value: ");
            } while (!int.TryParse(Console.ReadLine(), out minValue));

            int maxValue;
            do
            {
                Console.Write("Insert max range value: ");
            } while (!int.TryParse(Console.ReadLine(), out maxValue));

            if(minValue > maxValue)
            {
                Console.WriteLine("Max value must be bigger than the min value.");
                return;
            }

            int count = 0;

            if (minValue % 5 == 0 || maxValue % 5 == 0)
                count++;

            count += (maxValue - minValue) / 5;
            Console.WriteLine("There are {0} numbers divisibles of 5 in range of [{1}:{2}].", count, minValue, maxValue);
        }
    }
}