Wild Zoo

using System;
using System.Collections.Generic;
using System.Collections.Immutable;
using System.ComponentModel.Design;
using System.Data;
using System.Diagnostics;
using System.Globalization;
using System.Linq;
using System.Net.Http.Headers;
using System.Runtime.InteropServices.ComTypes;
using System.Security;
using System.Text;
using System.Transactions;
using System.Xml.Linq;
using System.Text.RegularExpressions;
using System.Threading;

namespace Homework
{
    public class Animals
    {
        class AnimalInfo
        {
            public int neededFood { get; set; }

            public string area { get; set; }
        }
        class Program
        {
            static void Main()
            {
                Dictionary<string, AnimalInfo> animals = new Dictionary<string, AnimalInfo>();
                Dictionary<string, int> areaPopulation = new Dictionary<string, int>();
                string[] commands = Console.ReadLine().Split(": ");
                while (commands[0] != "EndDay")
                {
                    string[] input = commands[1].Split("-");
                    if (commands[0] == "Add")
                    {
                        string animalName = input[0];
                        int neededFood = int.Parse(input[1]);
                        string area = input[2];

                        if (!animals.ContainsKey(animalName))
                        {
                            AnimalInfo animal = new AnimalInfo();
                            animal.area = area;
                            animal.neededFood = neededFood;
                            animals[animalName] = animal;
                            if (!areaPopulation.ContainsKey(area))
                            {
                                areaPopulation[area] = 1;
                            }
                            else
                            {
                                areaPopulation[area] += 1;
                            }
                        }
                        else
                        {
                            animals[animalName].neededFood += neededFood;
                        }
                    }
                    else if (commands[0] == "Feed")
                    {
                        string animalName = input[0];
                        int feedingWith = int.Parse(input[1]);
                        if (animals.ContainsKey(animalName))
                        {
                            animals[animalName].neededFood -= feedingWith;
                            if (animals[animalName].neededFood <= 0)
                            {
                                areaPopulation[animals[animalName].area] -= 1;
                                animals.Remove(animalName);
                                Console.WriteLine($"{animalName} was successfully fed");
                            }
                        }
                    }
                    commands = Console.ReadLine().Split(": ");
                }
                Console.WriteLine("Animals:");
                foreach (var item in animals.OrderByDescending(a => a.Value.neededFood).ThenBy(a => a.Key))
                {
                    Console.WriteLine($" {item.Key} -> {item.Value.neededFood}g");
                }
                Console.WriteLine("Areas with hungry animals:");
                foreach (var item in areaPopulation.OrderByDescending(a => a.Value).ThenBy(a => a.Key))
                {
                    if (item.Value > 0)
                    {
                        Console.WriteLine($" {item.Key}: {item.Value}");
                    }
                }
            }
        }
    }
}