//Rextester.Program.Main is the entry point for your code. Don't change it.

//Microsoft (R) Visual C# Compiler version 2.9.0.63208 (958f2354)

​

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text.RegularExpressions;

​

namespace Rextester

{

    public class Program

    {

        public static void Main(string[] args)

        {

            List<int> cisilka = new List<int>();

            cisilka.Add(1);

            cisilka.Add(2);

            cisilka.Add(3);

            cisilka.Add(4);

            cisilka.Add(5);

            List<int> cisilka2 = new List<int>();

            cisilka2.Add(3);

            cisilka2.Add(5);

            List<int> filteredCisilka = cisilka.Where(x => cisilka2.Contains(x)).ToList();

            foreach(int cislo in filteredCisilka) {

                Console.WriteLine(cislo);

            }

            //Your code goes here

        }

    }

}