using System;

class Program {
    static void Main(string[] args) {
        // Get the product name from the user
        Console.WriteLine("Enter the product name: ");
        string productName = Console.ReadLine();

        // Get the expire date from the user
        Console.WriteLine("Enter the expire date (MM/DD/YYYY): ");
        DateTime expireDate = DateTime.ParseExact(Console.ReadLine(), "MM/dd/yyyy", null);

        // Calculate the remaining time
        TimeSpan remainingTime = expireDate - DateTime.Now;

        // Check if the product has expired
        if (remainingTime.TotalSeconds < 0) {
            Console.WriteLine("The {0} has expired.", productName);
        } else {
            // Calculate the remaining time in days
            int remainingDays = (int)remainingTime.TotalDays;

            // Display the remaining time
            Console.WriteLine("The {0} will expire in {1} days.", productName, remainingDays);

            // Display the date/time value in long date format
            Console.WriteLine("Long date format: {0}", expireDate.ToLongDateString());

            // Display the date/time value in short date format
            Console.WriteLine("Short date format: {0}", expireDate.ToShortDateString());

            // Display the date/time value in custom format with three-letter day, months, and four-digit year
            Console.WriteLine("Custom format: {0}", expireDate.ToString("ddd MMM yyyy"));
        }

        // Wait for the user to press a key before exiting
        Console.ReadLine();
    }
}