using System;

using System.Linq; // For Math functions Min, Max, Sum

using System.Collections.Generic;

using System.IO;

public class Program

{

    public static void Main()

    { 

        /////////////  BASIC ARRAY  ////////////////

        int i;

        int[] x = new int[999];

        for(i=0;i<5;i++)x[i]=i+1;

        Array.Sort(x);

        Array.Reverse(x);

        Array.Sort(x, 0, 3); // Sort x[0] to x[2]

        Console.WriteLine("Size is: "+x.Length + " Sum is: "+x.Sum());

        int[,] arr2d = new int[3,2]{ {1, 2},{3, 4},{5, 6} };

        int[,] ar2D = new int[2,2];

        Console.WriteLine(arr2d[0, 1]); // Access 2D array

        // Functions=> Sort, Reverse, Length, Sum(), Min, Max

        /////////////  BASIC LIST (Vector)  ////////////////

        List<long> v = new List<long>();

        for(i=0;i<=5;i++)

            v.Add(i*2);

        v[3]=-1;

        for(i=0;i<v.Count;i++)Console.Write(v[i]+" ");

        Console.WriteLine();

        // Functions=> Reverse, Count, Add, Sort, Clear, Contains, RemoveAt, Remove, Insert, IndexOf, LastIndexOf, AddRange, BinarySearch(returns index)

        // v.Sort();

        // v.Clear();   Console.WriteLine("List size: "+v.Count);

        // v..AddRange(array);

        // v.Remove(8);

        // v.RemoveAt(0);

        // v.Contains(4); returns true if 4 exists

        // ind = v.IndexOf(key); // Returns>0 if 5 'key' exists

        //ind = v.IndexOf(key, 3); // Starts searching from 4th index

        /////////////  BASIC STACK  ////////////////

        Stack<int> st = new Stack<int>();

        // int[] arr = new int[]{ 1, 2, 3, 4};

        // Stack<int> myStack = new Stack<int>(arr);  // Creating Stack with prebuild Array

        for(i=0;i<=5;i++)

            st.Push(i*3);

        // Functions=> Push, Peek, Contains, Clear, Count, Pop(Returns & Remove)

        /////////////  BASIC QUEUE  ////////////////

        Queue<int> q = new Queue<int>();

        for(i=1;i<=5;i++)

            q.Enqueue(i*4);

        //Console.WriteLine(q.Peek());

        while(q.Count>0) Console.Write(q.Dequeue()+" ");    Console.WriteLine("\nNow Queue size: "+q.Count);

        // Functions=> Enqueue, Peek, Contains, Clear, Count, Dequeue(Returns & Remove)

        /* 

        /////////////  2D LIST  ////////////////

        List<List<String>> matrix= new List<List<String>>(); //Creates new nested List

        List<int> li = new List<int>(999); /// Fixed Size List

        matrix.Add(new List<String>()); //Adds new sub List

        matrix[0].Add("2349"); //Add values to the sub List at index 0

        matrix[0].Add("Hlw");

        matrix[0].Add("HII");

        string title = matrix[0][1];

        */

        /////////////  BASIC DICTIONARY  ////////////////

        Dictionary<string, int> mp = new Dictionary<String, int>();

        mp.Add("Riad", 1967);

        foreach(KeyValuePair<string, int> kvp in mp)

            Console.WriteLine("Name: {0}, Roll: {1}", kvp.Key, kvp.Value);

        foreach(var kvp in mp)

            Console.WriteLine("Name: {0}, Roll: {1}", kvp.Key, kvp.Value);

        mp["Riad"] = 1359;

        for(i=0;i<mp.Count;i++)

            Console.WriteLine("Name: {0}, Roll: {1}", mp.ElementAt(i).Key, mp.ElementAt(i).Value);

        if(mp.ContainsKey("Riad"))Console.WriteLine("Yes");

        mp.Remove("Riad");

        mp.Clear();

        // Functions=> Count, Add, Clear, Remove, ContainsKey, ContainsValue, First(),

        /////////////  SortedSet(set)  ////////////////

        SortedSet<long> st1 = new SortedSet<long>();

        // Functions=> Add, Clear, ContainsKey, Count, Max, Min, CopyTo, Remove,  First(),

        string[] s = Console.ReadLine().Split('.');

        Array.Resize(ref s, s.Length - 1);

        foreach(string S in s)Console.WriteLine(S);

        Console.WriteLine(s.Length);

        // Hello there.My name is Riad.

        Tuple<string, long, int> pair = new Tuple<string, long, int>("Riad", 1965, 65);

        Tuple.Create("Name", "Roll");

        // Functions=> Create(), .Item1,(Access by pair.Item1, .Item2) .Rest

        //string text = File.ReadAllText(@"c:\file.txt");

        //string[] lines = File.ReadAllLines(textFile);  

​

    }

}