using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            int years;
            int months;
            int days;

            Console.WriteLine("inserd date in this formad dd/mm/yyyy: ");
            Console.WriteLine("Days: ");
            days = int.Parse(Console.ReadLine());
            Console.WriteLine("Months: ");
            months = int.Parse(Console.ReadLine());
            Console.WriteLine("Years: ");
            years = int.Parse(Console.ReadLine());

            int dayz;
            switch (months)
            {
                case 1:
                case 3:
                case 5:
                case 7:
                case 8:
                case 10:
                case 12:
                    dayz = 31;
                    break;
                case 4:
                case 6:
                case 9:
                case 11:
                    dayz = 30;
                    break;
                case 2:
                    if (((years % 4 == 0) && !(years % 100 == 0)) || (years % 400 == 0))
                        dayz = 29;
                    else dayz = 28;
                    break;
                default: Console.WriteLine("Not Valid Month!");
                    dayz = 0;
                    break;
            }

            Console.WriteLine("Number Of Days: " + days);

            if (years <= 9999 && years >= 0 && months >= 1 && months <= 12 && days >= 1 && days <= 31)
                Console.WriteLine("date inserted correctly");



            else
            {
                Console.WriteLine("date inserted incorrect");

            }

            

            if (months == 1 || months == 3 || months == 5 || months == 7 || months == 8 || months == 10 || months == 12)
                Console.WriteLine("Number of days untill end of month: " + (31 - days));

            if (months == 1)
                Console.WriteLine("Number of days untill end of year: " + (364 - days));
            if (days == 31)
                Console.WriteLine("The next day: 1/2/ " + years);
            else
                Console.WriteLine("The next day: " + (days+1) + "/1/" + years);
            
            if (months == 2)
                Console.WriteLine("Number of days untill end of year: " + (364 - 31 - dayz - days));
            if (days == dayz)
                Console.WriteLine("The next day: 1/3/ " + years);
            else
                Console.WriteLine("The next day: " + (days + 1) + "/2/" + years);
            if (months == 3)
                Console.WriteLine("Number of days untill end of year: " + (364 - 31 - dayz - 31 - days));
            if (days == 31)
                Console.WriteLine("The next day: 1/4/ " + years);
            else
                Console.WriteLine("The next day: " + (days + 1) + "/3/" + years);
            if (months == 4)
                Console.WriteLine("Number of days untill end of year: " + (364 - 31 - dayz - 31 - 30 - days));
            if (days == 30)
                Console.WriteLine("The next day: 1/5/ " + years);
            else
                Console.WriteLine("The next day: " + (days + 1) + "/4/" + years);
                if (months == 5)
                    Console.WriteLine("Number of days untill end of year: " + (364 - 31 - dayz - 31 - 30 - 31 - days));
                if (days == 31)
                    Console.WriteLine("The next day: 1/6/ " + years);
                else
                    Console.WriteLine("The next day: " + (days + 1) + "/5/" + years);
            if (months == 6)
                Console.WriteLine("Number of days untill end of year: " + (364 - 31 - dayz - 31 - 30 - 31 - 30 - days));
            if (days == 30)
                Console.WriteLine("The next day: 1/7/ " + years);
            else
                Console.WriteLine("The next day: " + (days + 1) + "/6/" + years);
            if (months == 7)
                Console.WriteLine("Number of days untill end of year: " + (364 - 31 - dayz - 31 - 30 - 31 - 30 - 31 - days));
            if (days == 31)
                Console.WriteLine("The next day: 1/8/ " + years);
            else
                Console.WriteLine("The next day: " + (days + 1) + "/7/" + years);
            if (months == 8)
                Console.WriteLine("Number of days untill end of year: " + (364 - 31 - dayz - 31 - 30 - 31 - 30 - 31 - 31 - days));
            if (days == 31)
                Console.WriteLine("The next day: 1/9/ " + years);
            else
                Console.WriteLine("The next day: " + (days+1) + "/8/" + years);
            if (months == 9)
                Console.WriteLine("Number of days untill end of year: " + (364 - 31 - dayz - 31 - 30 - 31 - 30 - 31 - 31 - 30 - days));
            if (days == 30)
                Console.WriteLine("The next day: 1/10/ " + years);
            else
                Console.WriteLine("The next day: " + (days + 1) + "/9/" + years);
            if (months == 10)
                Console.WriteLine("Number of days untill end of year: " + (364 - 31 - dayz - 31 - 30 - 31 - 30 - 31 - 31 - 30 - 31 - days));
            if (days == 31)
                Console.WriteLine("The next day: 1/11 " + years);
            else
                Console.WriteLine("The next day: " + (days + 1) + "/10/" + years);
            if (months == 11)
                Console.WriteLine("Number of days untill end of year: " + (364 - 31 - dayz - 31 - 30 - 31 - 30 - 31 - 31 - 30 - 31 - 30 - days));
            if (days == 30)
                Console.WriteLine("The next day: 1/12 " + years);
            else
                Console.WriteLine("The next day: " + (days + 1) + "/11/" + years);
            if (months == 12)
                Console.WriteLine("Number of days untill end of year: " + (364 - 31 - dayz - 31 - 30 - 31 - 30 - 31 - 31 - 30 - 31 - 30 - 31 - days));
            if (days == 31)
                Console.WriteLine("The next day: 1/1/ " + (years + 1));
            else
                Console.WriteLine("The next day: " + (days + 1) + "/12/" + years);
             
            
        }
    }
}