using System;

public class Program

{

    public static void Main()

    {

        int year;

            int num = 0;

            int begin = 1896;

​

            do

            {

            label:

                try

                {

                    Console.Write("Investi norimus Olimpiniu metus (nuo 1896): ");

                    year = Convert.ToInt32(Console.ReadLine());

                }

                catch (Exception)

                {

                    Console.WriteLine("Netinkami duomenys");

                    goto label;

                }

​

                if (year >= begin)

                {

                    if ((year - begin) % 4 == 0)

                    {

                        num = Olympic_Fourth(year, num, begin);

                    }

                    else

                    {

                        Console.WriteLine("{0} metai ne Olimpiniai\n", year);

                    }

                }

                else

                {

                    Console.WriteLine("Dar nebuvo zaidyniu.\n");

                }

​

            } while (true);

​

        }

​

        private static int Olympic_Fourth(int year, int num, int begin)

        {

            for (int i = begin; i <= year; i += 4)

            {

                num++;

                if (i == year)

                {

                    Console.WriteLine("{0} yra Olimpiniu zaidyniu" +

                        " metai, ju numeris {1}\n", year, num);

                }

            }

​

            return num;

        }

}