using System;
using System.Collections.Generic;

namespace C1907L
{
    class Program
    {
        static void Main(string[] args)
        {
            //testBasic();
            //testConstruct();
            testArray();
        }

        static void testArray() {
            int[] t = new int[10];
            int length = t.Length;
            //index : 0 -> length - 1 (9)
            string[] list = new string[5];

            int[] t1 = { 1, 6, 2, 3, 10 };

            for (int i = 0; i < t1.Length; i++) {
                Console.WriteLine("T[{0}] = {1}", i, t1[i]);
            }

            int[,] t2 = new int[2, 3];
            t2[0, 0] = 19;

            List<int> l1 = new List<int>();
            l1.Add(12);
            l1.Add(22);

            Console.WriteLine("index 0 => " + l1[0]);

            l1[0] = 2312;

            int size = l1.Count;

            foreach(int k in l1) {
                Console.WriteLine(k);
            }
        }

        static void testConstruct() {
            int num = -4;
            if(num < 0) {
                Console.WriteLine("Num la so am");
            }

            num = 13;

            if(num < 0) {
                Console.WriteLine("Num la so a");
            } else {
                if(num % 2 == 0) {
                    Console.WriteLine("Num la so chan");
                } else {
                    Console.WriteLine("Num la so le");
                }
            }
        }

        static void testBasic() {
            Console.WriteLine("Hello World!");
            string str1 = "123";
            String str2 = "sdfsdfds";
            Console.WriteLine("str = " + str1 + ", str2 = " + str2);
            Console.WriteLine("str = {0}, str2 = {1} - {0}", str1, str2);
            //nhap xuat tu ban phim
            string str;
            Console.WriteLine("nhap str = ");
            str = Console.ReadLine();

            Console.WriteLine("Nhap t = ");
            int t = int.Parse(Console.ReadLine());

            int t1 = 5;
            int t2 = ++t1;//t2 = 6 (t1=6)
            int t3 = t2++;//t3 = 6 (t2 = 7)
            int t4 = t1++ + ++t1 - t2++ - --t3;
            //6(t1=7) + 8(t1=8) - 7 (t2=8) - 5 (t3=5)
            //t1 = ? 5, 8
            //t2 = ? 6, 8
            //t3 = ? 5, 6
            //t4 = ? 2
            Console.WriteLine("T1 = {0}, T2 = {1}, T3 = {2}, T4 = {3}", t1, t2, t3, t4);

            int k = 5;
            string kk = (k == 5) ? "OK" : "NOT OK";
            Console.WriteLine(kk);
        }
    }

    class Abc {
        public void ShowOk() {
            Console.WriteLine("1231321");
        }
    }
}

namespace XYZ.OKOK.TTT {
    class T {
        
    }
}