Array Manipulator

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Numerics;

namespace _02_SecondExercise
{
    class KaminoFactory
    {
        static void Main(string[] args)
        {
            List<int> arr = Console.ReadLine().Split().Select(int.Parse).ToList();
            string input = Console.ReadLine();

            while (input!="end")
            {
                string[] tokens = input.Split().ToArray();
                string command = tokens[0];
                if (command== "exchange")
                {
                    int index = int.Parse(tokens[1]);
                    if (index<arr.Count)
                    {
                      index++;
                        var temp = arr.Take(index);
                        arr = arr.Skip(index).ToList();
                        arr = arr.Concat(temp).ToList();
                    }
                    else
                    {
                        Console.WriteLine("Invalid index");
                    }
                }
                if (command=="max")
                {
                    string evenOdd = tokens[1];
                    if (evenOdd == "even")
                    {
                        int max = int.MinValue;
                        int indexEven =-1;
                        for (int i = 0; i < arr.Count; i++)
                        {
                            if (arr[i] % 2 == 0)
                            {
                                if (arr[i] >= max)
                                {
                                    max = arr[i];
                                    indexEven = i;
                                }
                            }
                        }
                        if (indexEven == -1)
                        {
                            Console.WriteLine("No matches");
                        }
                        else { Console.WriteLine(indexEven); }

                    }
                    else if (evenOdd == "odd")
                    {
                        int max = int.MinValue;
                        int indexOdd = -1;
                        for (int i = 0; i < arr.Count; i++)
                        {
                            if (arr[i] % 2 != 0)
                            {
                                if (arr[i] >= max)
                                {
                                    max = arr[i];
                                    indexOdd = i;
                                }
                            }
                        }
                        if (indexOdd == -1)
                        {
                            Console.WriteLine("No matches");
                        }
                        else { Console.WriteLine(indexOdd); }
                    }
                }
                if (command == "min")
                {
                    string evenOdd = tokens[1];
                    if (evenOdd == "even")
                    {
                        int min = int.MaxValue;
                        int indexEven = -1;
                        for (int i = 0; i < arr.Count; i++)
                        {
                            if (arr[i] % 2 == 0)
                            {
                                if (arr[i] <= min)
                                {
                                    min = arr[i];
                                    indexEven = i;
                                }
                            }
                        }
                        if (indexEven == -1)
                        {
                            Console.WriteLine("No matches");
                        }
                        else { Console.WriteLine(indexEven); }

                    }
                    else if (evenOdd == "odd")
                    {
                        int min = int.MaxValue;
                        int indexOdd = -1;
                        for (int i = 0; i < arr.Count; i++)
                        {
                            if (arr[i] % 2 != 0)
                            {
                                if (arr[i] <= min)
                                {
                                    min = arr[i];
                                    indexOdd = i;
                                }
                            }
                        }
                        if (indexOdd == -1)
                        {
                            Console.WriteLine("No matches");
                        }
                        else { Console.WriteLine(indexOdd); }
                    }
                }
                if (command =="first")
                {
                    int count = int.Parse(tokens[1]);
                    if (count > arr.Count)
                    {
                        Console.WriteLine("Invalid count");
                    }
                    else
                    {
                        string seccommand = tokens[2];
                        List<int> firstEven = new List<int>();
                        List<int> firstOdd = new List<int>();
                        if (seccommand == "even")
                        {
                            for (int i = 0; i < arr.Count; i++)
                            {
                                if (arr[i] % 2 == 0)
                                {
                                    firstEven.Add(arr[i]);
                                }
                            }
                            firstEven = firstEven.Take(count).ToList();
                            Console.WriteLine($"[" + string.Join(", ", firstEven) + "]");
                        }
                        else if (seccommand == "odd")
                        {
                            for (int i = 0; i < arr.Count; i++)
                            {
                                if (arr[i] % 2 != 0)
                                {
                                    firstOdd.Add(arr[i]);
                                }
                            }
                            firstOdd = firstOdd.Take(count).ToList();
                            Console.WriteLine($"[" + string.Join(", ", firstOdd) + "]");
                        }
                    }

                }
                if (command =="last")
                {
                    int count = int.Parse(tokens[1]);
                    if (count > arr.Count)
                    {
                        Console.WriteLine("Invalid count");
                    }
                    else
                    {
                        string seccommand = tokens[2];
                        List<int> lastEven = new List<int>();
                        List<int> lastOdd = new List<int>();
                        if (seccommand == "even")
                        {
                            for (int i = 0; i < arr.Count; i++)
                            {
                                if (arr[i] % 2 == 0)
                                {
                                    lastEven.Add(arr[i]);
                                }
                            }
                            lastEven = lastEven.Take(count).ToList();
                            Console.WriteLine($"[" + string.Join(", ", lastEven) + "]");
                        }
                        else if (seccommand == "odd")
                        {
                            for (int i = 0; i < arr.Count; i++)
                            {
                                if (arr[i] % 2 != 0)
                                {
                                    lastOdd.Add(arr[i]);
                                }
                            }
                            lastEven = lastEven.Take(count).ToList();
                            Console.WriteLine($"[" + string.Join(", ", lastOdd) + "]");
                        }
                    }

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