7. Andrey and Billiard

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

public class Client
{
    public Client()
    {
        this.Order=new Dictionary<Product,int>();
    }


    public string Name{get;set;}

    public Dictionary<Product,int>Order{get;set;}

    public double Bill=>Order.Sum(x=>x.Key.Price*x.Value);

    public override string ToString()
    {
        StringBuilder sb=new StringBuilder();
        sb.AppendLine(this.Name);
        foreach(var p in this.Order)
        {
            string current=$"-- {p.Key.Type} - {p.Value}";
            sb.AppendLine(current);
        }

        string bill=$"Bill: {this.Bill:f2}";
        sb.AppendLine(bill);
        return sb.ToString().TrimEnd();
    }
}

public class Product
{
    public string Type{get;set;}

    public double Price{get;set;}

}


public class Program
{


    public static void Main()
    {
        List<Product>offerList= new List<Product>();
        List<Client>clients=new List<Client>();

        int n=int.Parse(Console.ReadLine());

        for(int i=0;i<n;i++)
        {

            string[]inputTokens=Console.ReadLine().Split(new []{'-'},StringSplitOptions.RemoveEmptyEntries).ToArray();

            string name=inputTokens[0];
            double price=double.Parse(inputTokens[1]);

            if(offerList.Any(x=>x.Type==name))
            {
                var existingProduct=offerList.First(x=>x.Type==name);
                existingProduct.Price=price;
                continue;
            }

            var product=new Product
            {
             Type=name,
             Price=price
            };

            offerList.Add(product);
        }

        string input;

        while((input=Console.ReadLine())!="end of clients")
        {
            string[] tokens=input.Split(new []{'-',','},StringSplitOptions.RemoveEmptyEntries).ToArray();

            string name=tokens[0];
            string productName=tokens[1];
            int quantity=int.Parse(tokens[2]);


            if(!offerList.Any(x=>x.Type==productName))
               {
                continue;
               }

            var client=clients.FirstOrDefault(x=>x.Name==name);
            var product=offerList.FirstOrDefault(p=>p.Type==productName);

            if(client==null)
            {

                client=new Client
                {
                    Name=name
                };
                client.Order.Add(product,quantity);

                clients.Add(client);
                continue;
            }

            bool alreadyOrderedOnce=client.Order.Any(x=>x.Key.Type==productName);
            if(alreadyOrderedOnce)
            {

             client.Order[product]+=quantity;

            }
            else
            {
              client.Order.Add(product,quantity);

            }

        }
        var ordered = clients.OrderBy(x => x.Name).ToList();
        foreach(var c in ordered)
        {

            Console.WriteLine(c.ToString());
        }
        double totalBill=clients.Sum(x=>x.Bill);
        Console.WriteLine($"Total bill: {totalBill:f2}");
    }
}