04. Population Aggregation

gistfile1.txt

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Numerics;
using System.Globalization;
using System.Text.RegularExpressions;
using System.Threading;

class Programa
{
    static void Main(string[] args)
    {
        string[] input = Console.ReadLine().Split('\\').ToArray();
        SortedDictionary<string, int> countries = new SortedDictionary<string, int>();
        Dictionary<long, string> cityes = new Dictionary<long, string>();
  
        while (input[0]!="stop")
        {
            char[] first = input[0].ToCharArray();
            string clearWord = string.Empty;
            for (int i = 0; i < first.Length; i++)
            {
                if (char.IsLetter(first[i]))
                {
                    clearWord += first[i];
                }
            }
            if (char.IsLower(clearWord.First()))
            {
                if (!cityes.ContainsValue(clearWord))
                {
                    cityes.Add(long.Parse(input[2]), clearWord);
                }
                
            }
            else
            {
                if (countries.ContainsKey(clearWord))
                {
                    countries[clearWord]++;
                }
                else
                {
                    countries.Add(clearWord, 1);
                }               
            }
            char[] second = input[1].ToCharArray();
            string clearSecondWord = string.Empty;
            for (int i = 0; i < second.Length; i++)
            {
                if (char.IsLetter(second[i]))
                {
                    clearSecondWord += second[i];
                }
            }
            if (char.IsLower(clearSecondWord.First()))
            {
                if (!cityes.ContainsValue(clearSecondWord))
                {
                    cityes.Add(long.Parse(input[2]), clearSecondWord);
                }               
            }
            else
            {
                if (countries.ContainsKey(clearSecondWord))
                {
                    countries[clearSecondWord]++;
                }
                else
                {
                    countries.Add(clearSecondWord, 1);
                }
            }
            input = Console.ReadLine().Split('\\').ToArray();
        }
        foreach (var item in countries)
        {
            Console.WriteLine("{0} -> {1}",item.Key,item.Value);
        }
        int max = Math.Min(3, cityes.Count);
        int counter = 0;
        var l = cityes.OrderByDescending(b => b.Key);
        foreach (var item in l)
        {
            Console.WriteLine("{0} -> {1}",item.Value,item.Key);
            counter++;
            if (counter==max)
            {
                break;
            }
        }
    }
}