02.Ad_Astra

using System;
using System.Text.RegularExpressions;

namespace _02.Ad_Astra
{
    class Program
    {
        static void Main(string[] args)
        {
            string input = Console.ReadLine();
            string regex = @"([#|])(?<food>[a-zA-Z\s]+)(\1)(?<date>[0-9]{2}\/[0-9]{2}\/[0-9]{2})(\1)(?<calories>[0-9]+)(\1)";

            MatchCollection matches = Regex.Matches(input, regex);

            int totalCalories = 0;
            int neededCalsFor1Day = 2000;
            foreach (Match match in matches)
            {
                totalCalories += int.Parse(match.Groups["calories"].Value);
            }

            int daysToLast = totalCalories / neededCalsFor1Day;
            Console.WriteLine($"You have food to last you for: {daysToLast} days!");

            foreach (Match match in matches)
            {
                Console.WriteLine($"Item: {match.Groups["food"].Value}, Best before: {match.Groups["date"].Value}, Nutrition: {match.Groups["calories"].Value}");
            }
        }
    }
}