using System;

public class Program

{

    public static void Main()

    {

        int s=0, i;

        for(i=1; i<=17; i++)

        {

            if((i % 3 == 0) || (i%5 == 0))

            {

                s = s + i;

            }

        }

        Console.WriteLine("{0}", s);

    }

}