SumOfNumbers

class Program
{
    static void Main(string[] args)
    {
        int minNumber = 1;
        int maxNumber = 100;
        int denomunator1 = 3;
        int denominator2 = 5;
        int sum = 0;

        Random random = new Random();
        int value = random.Next(minNumber, maxNumber);

        for (int i = value; i > 0; i--)
        {
            if (i % denominator2 == 0 || i % denomunator1 == 0)
            {
                sum += i;
            }
        }

        Console.WriteLine(sum);
    }
}