using System;

internal static class Program
{
    private static void Main(string[] args)
    {
        var session = new Session();
        Console.WriteLine($"Accepted: {session.Reserve(4)}");
        Console.WriteLine($"Too many: {session.Reserve(9)}");
        Console.WriteLine($"Reserved: {session.Reserved}");
    }
}

internal sealed class Session
{
    private int reserved;
    public int Reserved => reserved;
    public bool Reserve(int count)
    {
        if (count < 1 || count > 10 - reserved) return false;
        reserved += count; return true;
    }
}