02. Array Manipulator

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

namespace ExamPreparation3
{
    class Program
    {
        static void Main(string[] args)
        {
            var array = Console.ReadLine()
                 .Split()
                 .Select(int.Parse)
                 .ToArray();
            int maxOdd = 0;
            int maxEven = 1;
            int minEven = int.MaxValue;
            int minOdd = int.MaxValue;

            string command = Console.ReadLine();
            while (command != "end")
            {
                if(command.Contains("exchange"))
                {
                    var inputParams = command.Split();
                    var index = int.Parse(inputParams[1]);
                    if (index >= 0 && index < array.Length)
                    {
                        var leftSide = array.Take(index + 1);
                        var rightSide = array.Skip(index + 1);
                        var combine = rightSide.Concat(leftSide).ToArray();
                        array = combine;
                    }
                    else
                    {
                        Console.WriteLine("Invalid index");
                    }
                }
                else if(command == "max odd")
                {
                    for (int i = 0; i < array.Length; i++)
                    {
                        if(array[i] % 2 != 0)
                        {
                            if(array[i] > maxOdd)
                            {
                                maxOdd = array[i];
                            }
                        }
                    }
                   if(maxOdd != 0)
                    {
                        var indexOf = Array.LastIndexOf(array,maxOdd);
                        Console.WriteLine(indexOf);
                    }
                    else
                    {
                        Console.WriteLine("No matches");
                    }
                }
                else if (command == "max even")
                {
                    for (int i = 0; i < array.Length; i++)
                    {
                        if (array[i] % 2 == 0)
                        {
                            if (array[i] > maxEven)
                            {
                                maxEven = array[i];
                            }
                        }
                    }
                    if (maxEven != 1)
                    {
                        var indexOf = Array.LastIndexOf(array, maxEven);
                        Console.WriteLine(indexOf);
                    }
                    else
                    {
                        Console.WriteLine("No matches");
                    }
                }
                else if (command == "min even")
                {
                    for (int i = 0; i < array.Length; i++)
                    {
                        if (array[i] % 2 == 0)
                        {
                            if (array[i] < minEven)
                            {
                                minEven = array[i];
                            }
                        }
                    }
                    if (minEven != int.MaxValue)
                    {
                        var indexOf = Array.LastIndexOf(array, minEven);
                        Console.WriteLine(indexOf);
                    }
                    else
                    {
                        Console.WriteLine("No matches");
                    }
                }
                else if (command == "min odd")
                {
                    for (int i = 0; i < array.Length; i++)
                    {
                        if (array[i] % 2 != 0)
                        {
                            if (array[i] < minOdd)
                            {
                                minOdd = array[i];
                            }
                        }
                    }
                    if (minOdd != int.MaxValue)
                    {
                        var indexOf = Array.LastIndexOf(array, minOdd);
                        Console.WriteLine(indexOf);
                    }
                    else
                    {
                        Console.WriteLine("No matches");
                    }
                }
                else if (command.Contains("first"))
                {
                    var inputParams = command.Split().ToArray();
                    var count = inputParams[1];
                    if (int.Parse(count) <= array.Length)
                    {
                        if (inputParams[2] == "odd")
                        {
                            var Odd = new List<int>();
                            for (int i = 0; i < array.Length; i++)
                            {
                                if (array[i] % 2 != 0)
                                {
                                    Odd.Add(array[i]);
                                }
                            }
                            var result = Odd.Take(int.Parse(count)).ToArray();
                            Console.WriteLine("[" + string.Join(", ", result) + "]");
                        }
                        if (inputParams[2] == "even")
                        {
                            var Even = new List<int>();
                            for (int i = 0; i < array.Length; i++)
                            {
                                if (array[i] % 2 == 0)
                                {
                                    Even.Add(array[i]);
                                }
                            }
                            var result = Even.Take(int.Parse(count)).ToArray();
                            Console.WriteLine("[" + string.Join(", ", result) + "]");
                        }
                    }
                    else
                    {
                        Console.WriteLine("Invalid count");
                    }
                }
                else if(command.Contains("last"))
                {
                    var inputParams = command.Split();
                    var count = inputParams[1];
                    if (int.Parse(count) <= array.Length)
                    {
                        if (inputParams[2] == "odd")
                        {
                            var Odd = new List<int>();
                            for (int i = 0; i < array.Length; i++)
                            {
                                if (array[i] % 2 != 0)
                                {
                                    Odd.Add(array[i]);
                                }
                            }

                            Odd.Reverse();
                            var result = Odd.Take(int.Parse(count)).ToArray();
                            Console.WriteLine("[" + string.Join(", ", result) + "]");
                        }
                        if (inputParams[2] == "even")
                        {
                            var Even = new List<int>();
                            for (int i = 0; i < array.Length; i++)
                            {
                                if (array[i] % 2 == 0)
                                {
                                    Even.Add(array[i]);
                                }
                            }
                            Even.Reverse();
                            var result = Even.Take(int.Parse(count)).ToArray();
                            Console.WriteLine("[" + string.Join(", ", result) + "]");
                        }
                    }
                    else
                    {
                        Console.WriteLine("Invalid count");
                    }

                }
                command = Console.ReadLine();
            }
            Console.WriteLine("[" + string.Join(", ",array) + "]");
        }
    }
}