visokosnigodini ot godina do godina

using System;

class Program
{
    static void Main()
    {
        int fromAYear = int.Parse(Console.ReadLine());
        int upToAYear = fromAYear - 50;


        for (int i = fromAYear; i >= upToAYear; i--)
        {
            if (DateTime.IsLeapYear(i))
            {
                Console.WriteLine(i);
            }
        }
    }
}