using System;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Please type a month's number (between 1-12)");

        int month = int.Parse(Console.ReadLine());

        int year;

        if (month == 2)

        {

            Console.WriteLine("28");

        }

        else if (month == 4 || month == 6 || month == 9 || month == 11 )

        {

            Console.WriteLine("30");

        }

        else

        {

            Console.WriteLine("31");

        }

        Console.WriteLine("Please type a year's number (between 1-12)");

        int year = int.Parse(Console.ReadLine());

        if ( year / 4 == year / 4.0)

        {

            Console.WriteLine("February has 29 days");

        }

    }

}