using System;

namespace CSLight
{
    public class Program
    {
        static void Main(string[] args)
        {
            Random rnd = new Random();

            int number = rnd.Next(0, 100);
            int dividerOne = 3;
            int dividerTwo = 5;
            int sumNumbers = 0;

            Console.WriteLine($"Сгенерированное число:{number}");

            for (int i = 0; i <= number; i++)
            {
                if(i % dividerOne == 0 || i % dividerTwo == 0)
                {
                    sumNumbers += i;
                }
            }

            Console.WriteLine(sumNumbers);
        }
    }
}