[C#] Exam - 03. Football League

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;


class FootballLeague
{
    static void Main()
    {
        string key = Console.ReadLine();
        var standings = new Dictionary<string, long>();
        var scorers = new Dictionary<string, long>();
        while (true)
        {
            string input = Console.ReadLine();

            if (input == "final")
            {
                break;
            }
            var firstStartIndex = input.IndexOf(key) + key.Length;
            var firstEndIndex = input.IndexOf(key, firstStartIndex);
            var firstTeamNameLength = firstEndIndex - firstStartIndex;
            var team1 = input.Substring(firstStartIndex, firstTeamNameLength);
            team1 = Reverse(team1);
            team1 = team1.ToUpper();
            var secondStartIndex = input.IndexOf(key, firstEndIndex + key.Length) + key.Length;
            var secondEndIndex = input.IndexOf(key, secondStartIndex);
            var secondTeamNameLength = secondEndIndex - secondStartIndex;
            var team2 = input.Substring(secondStartIndex, secondTeamNameLength);
            team2 = Reverse(team2);
            team2 = team2.ToUpper();
            string[] splitedInput = input.Split(' ').ToArray();
            string score = splitedInput[2];
            long[] scoreTokens = score.Split(':').Select(long.Parse).ToArray();
            long score1 = scoreTokens[0];
            long score2 = scoreTokens[1];
            long pointsTeam1 = 0;
            long pointsTeam2 = 0;
            if (score1 > score2)
            {
                pointsTeam1 = 3;
            }
            else if (score1 == score2)
            {
                pointsTeam1 = 1;
                pointsTeam2 = 1;
            }
            else
            {
                pointsTeam2 = 3;
            }

            if (standings.ContainsKey(team1))
            {
                standings[team1] += pointsTeam1;
                scorers[team1] += score1;
            }
            else
            {
                standings[team1] = pointsTeam1;
                scorers[team1] = score1;
            }

            if (standings.ContainsKey(team2))
            {
                standings[team2] += pointsTeam2;
                scorers[team2] += score2;
            }
            else
            {
                standings[team2] = pointsTeam2;
                scorers[team2] = score2;
            }
        }
        standings = standings.OrderBy(x => x.Key).OrderByDescending(x => x.Value).ToDictionary(t => t.Key, t => t.Value);
        scorers = scorers.OrderBy(x => x.Key).OrderByDescending(x => x.Value).Take(3).ToDictionary(t => t.Key, t => t.Value);
        long place = 1;
        Console.WriteLine("League standings:");
        foreach (var team in standings.Keys)
        {
            Console.WriteLine($"{place}. {team} {standings[team]}");
            place++;
        }
        Console.WriteLine("Top 3 scored goals:");
        foreach (var team in scorers.Keys)
        {
            Console.WriteLine($"- {team} -> {scorers[team]}");
        }

    }
    public static string Reverse(string s)
    {
        char[] charArray = s.ToCharArray();
        Array.Reverse(charArray);
        return new string(charArray);
    }
}