using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            int tong;
            tong = boi3(3);
            tong += boi5(5);
            System.Console.WriteLine(tong);
            System.Console.ReadLine();

        }
        public static int boi3(int temp)
        {
            if (temp < 1000)
            {
                return temp + boi3(temp + 3);
            }
            else
                return 0;
        }
        public static int boi5(int temp)
        {
            if (temp < 1000)
            {
                if (temp % 3 == 0)
                    return boi5(temp + 5);
                else
                    return temp + boi5(temp + 5);
            }
            else
                return 0;
        }
    }
}