using System;

using static System.Console;

using System.Globalization;

public class Program {

    public static void Main() {

        if (!ValidaData("24/10/2016")) WriteLine("invalido");

        if (!ValidaHora("27:10:15")) WriteLine("invalido");

    }

    public static bool ValidaData(string maskdata) => DateTime.ParseExact(maskdata, "dd/MM/yyyy", CultureInfo.InvariantCulture) <= DateTime.Now.AddDays(-1);

    public static bool ValidaHora(string maskhora) => int.Parse(maskhora.Split(':')[0]) <= 24;

}