using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;

namespace jsonWork
{
    class Program
    {
        static void Main(string[] args)
        {
            var pizzass = JsonConvert.DeserializeObject<List<PizzaIngredients>>(File.ReadAllText("Pizzas.json"))
                .GroupBy(g => String.Join(", ", g.toppings.OrderBy(o => o)))

                .Select(s => new { topping = s.Key, count = s.Count() })
                .OrderByDescending(o => o.count);

            int nums = 1;

            int prewVal = Int32.MaxValue;

            foreach (var row in pizzass)
            {
                if (nums <= 20)
                {
                    Console.WriteLine($"pizza (topping): {row.topping}. count: {row.count}");
                }
                if (row.count < prewVal)
                {
                    prewVal = row.count;

                    nums++;
                }
            }
        }
    }
    public class PizzaIngredients
    {
        public List<string> toppings { get; set; }
    }
}