Strings

using System;
using System.Collections.Generic;
using System.Linq;

namespace ex1
{
    class Program
    {
        static void Main(string[] args)
        {
            string text = Console.ReadLine();
            List<string> words = text.Split(new char[] {',', ' ', '.', '!', '?', '-'}).ToList();

            // The laziest solution -> prints how many times every word exists in the given input
            //while (words.Count != 0)
            //{
            //    string word = words[0];
            //    Console.WriteLine(word + "--> " + words.Count(x => x == word));
            //    words.RemoveAll(x => x == word);
            //}


            // This solution prints the most common word in the given input
            int maxCounter = 0;
            string maxWord = string.Empty;
            int currentCounter = 1;
            for (int i = 0; i < words.Count; i++)
            {
                if (HasBeenEarlier(words, i)) // Just optimization
                {
                    continue;
                }
                if (maxCounter >= words.Count - i) // Another optimization
                {
                    break;
                }

                for (int j = i + 1; j < words.Count; j++)
                {

                    if (words[i] == words[j])
                    {
                        currentCounter += 1;
                    }
                }

                if (currentCounter > maxCounter)
                {
                    maxCounter = currentCounter;
                    maxWord = words[i];
                }
                currentCounter = 1;
            }
            Console.WriteLine("The moast common word is: " + maxWord + " --> " + maxCounter);

        }

        static bool HasBeenEarlier(List<string> words, int border)
        {
            for (int i = 0; i < border; i++)
            {
                if (words[i] == words[border])
                {
                    return true;
                }
            }
            return false;
        }
    }
}