Product Shop

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

namespace _03._Product_Shop
{
    class Program
    {
        static void Main(string[] args)
        {
            // 03.  Product Shop - Sets and Dictionaries Advanced - Lab

            Dictionary<string, Dictionary<string, double>> productShops = new Dictionary<string, Dictionary<string, double>>();

            string[] info = Console.ReadLine().Split(", ", StringSplitOptions.RemoveEmptyEntries);

            while (info[0] != "Revision")
            {
                string shop = info[0];
                string product = info[1];
                double price = double.Parse(info[2]);

                if (!productShops.ContainsKey(shop))
                {
                    productShops.Add(shop, new Dictionary<string, double>());
                }

                if (!productShops[shop].ContainsKey(product))
                {
                    productShops[shop].Add(product, 0);
                }

                productShops[shop][product] = price;

                info = Console.ReadLine().Split(", ", StringSplitOptions.RemoveEmptyEntries);
            }

            foreach (var shop in productShops.OrderBy(shop => shop.Key))
            {
                Console.WriteLine($"{shop.Key}->");

                foreach (var product in shop.Value)
                {
                    Console.WriteLine($"Product: {product.Key}, Price: {product.Value}");
                }
            }
        }
    }
}