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

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            //zad 1
            string s = "Kordos_0117.zip";
            string pattern = @"^[A-Z][a-z]{2,14}_(0[0-9]|1[0-2])(0[0-9]|[1-2][0-9]|3[0-1])\.zip$";
            if (Regex.IsMatch(s, pattern))
            {
                Console.WriteLine("true");

            }
            else
            {
                Console.WriteLine("false");
            }

            //zad 2
            var L1 = new List<C>();

            for (int i = 0; i < 10; i++)
            {
                L1.Add(new C());
                for (int j = 0; j < 10; j++)
                {
                    L1[i].D.Add(j,j+5);
                }
            }

            var L2 = new List<C>();

            for (int i = 0; i < 10; i++)
            {
                L2.Add(new C());
                for (int j = 0; j < 10; j++)
                {
                    L2[i].D.Add(L1[i].D.Keys.ElementAt(j),L1[i].D[j]);
                }
            }

            L1[2].D[2] = 3;
            Console.WriteLine(L1[2].D[2]);
            Console.WriteLine(L2[2].D[2]);

            var rnd= new Random();
            var T1 = new int[30];
            var T2 = new int[30];

            for (int i = 0; i < 30; i++)
            {
                T1[i] = rnd.Next(0, 40);
                T2[i] = rnd.Next(0, 40);
            }

            T1.Where(x=>x%2!=0).
                OrderBy(x=>x).
                ToList().
                ForEach(x=>Console.WriteLine(x));

            T1.Skip(3).
                Take(10).
                Where(x => x % 2 != 0).
                OrderBy(x => x).
                ToList().
                ForEach(x => Console.WriteLine(x));

            Console.WriteLine();
            T1.Intersect(T2).Where(x=>x>20).ToList().ForEach(x=>Console.WriteLine(x));

            Console.WriteLine();
            T1.Except(T2).Where(x => x > 20).ToList().ForEach(x => Console.WriteLine(x));

            Console.WriteLine();
            var vari = Math.Sqrt( T1.Sum(x => Math.Pow( x,2))-Math.Pow(T1.Sum(x => x),2));
            Console.WriteLine(vari);
        }
    }

    class C
    {
        public Dictionary<int, int> D = new Dictionary<int, int>();


    }
}