using System;

internal static class Program
{
    private static void Main(string[] args)
    {
        Console.WriteLine($"Default: {PlannedMinutes(40, 10)}");
        Console.WriteLine($"Custom: {PlannedMinutes(teaching: 40, setup: 10, reserve: 8)}");
    }

    internal static int PlannedMinutes(int teaching, int setup, int reserve = 5)
    {
        return teaching + setup + reserve;
    }
}