using System;

public class Program

{

    public static void Main()

    {

        int currentLevel = 17;

        int pointsPerGame = 5000;

        int minutesPerGame = 30;

        int daysRemaining = (new DateTime(2020,8,2) - DateTime.Now).Days;

        Console.WriteLine("Average points per game: " + pointsPerGame + ".");

        Console.WriteLine("Average minutes per game: " + minutesPerGame + ".");

        Console.WriteLine("Days remaining: " + daysRemaining + ".\n");

        WriteCalculate(pointsPerGame, minutesPerGame, daysRemaining, currentLevel, new int[] {5, 10, 15, 20, 25, 30, 35, 40, 45, 50});

    }

    private static void WriteCalculate(int pointsPerGame, int minutesPerGame, int daysRemaining, int currentLevel, int[] destinationLevels) {

        Console.WriteLine("From level " + currentLevel + ":\n");

        int total, matches;

        decimal hours, hoursPerDay, matchesPerDay;

        foreach (int level in destinationLevels) {

            if (currentLevel < level) {

                total = Calculate(level, currentLevel);

                matches = (int)Math.Ceiling((decimal)total/pointsPerGame);

                hours = matches * minutesPerGame/60;

                matchesPerDay = Math.Round(Decimal.Divide((decimal)matches, (decimal)daysRemaining),2);

                hoursPerDay = Math.Round(matchesPerDay * minutesPerGame/60,2); 

​

                Console.WriteLine(level.ToString() + " = " + total + " xp.  Games needed: " + matches + ". Time needed: " + hours + "h.     Matches per day: " + matchesPerDay + ".     Time per day: " + hoursPerDay + "h.");

            }

        }

    }

    private static int Calculate(int level, int currentLevel = 0, int total = 0) {

        if (level == currentLevel) return total;

        return Calculate(--level, currentLevel, total + 2000 + level * 1000);

    }

}