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


namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            List<int> ar = new List<int>();
            ar.Clear();
            ar.Add(10);
            ar.Add(20);
            Console.WriteLine(ar.Count());
            for (int i = 0; i < ar.Count(); ++i)
            {
                Console.WriteLine(ar[i]);
            }
            long a = 10;
            SortedSet<long> mas = new SortedSet<long>();
            mas.Clear();
            mas.Add(135);
            mas.Add(136);
            mas.Add(1287129847111111);
            mas.Add(135);
            Console.WriteLine(mas.Count());
            foreach (int i in mas)
            {
                Console.WriteLine(i);
            }
        }
    }
}