using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml.Serialization;

namespace ConsoleApp10
{


    public static class Prices
    {
        public static int _intern = 5;
        public static int _extern = 10;
    }

    [Serializable]
    public class Subscriber
    {
        static Random ran = new Random();


        public int ID;

        public string Surname;

        public string Name;

        public int balance;

        public int externalCalls;

        public int internalCalls;

        public static int operator +(Subscriber s, int C)
        {
            s.balance += C;
            return s.balance;
        }

        public static bool operator true (Subscriber s)
        {
            return (s.balance >= (s.internalCalls * Prices._intern + s.externalCalls * Prices._extern));
        }

        public static bool operator false(Subscriber s)
        {
            return (s.balance < (s.internalCalls * Prices._intern + s.externalCalls * Prices._extern));
        }

        public override string ToString()
        {
            return $"ID : {ID}\nName: {Name}\nSurname: {Surname}\nBalance: {balance}" +
                $"\nExternal calls time: {externalCalls}\nInternal calls time: {internalCalls}\n\n";
        }

        public Subscriber(int id, string name, string surname, int balance, int i, int e)
        {
            ID = id + 1000;
            this.Name = name;
            this.Surname = surname;
            this.balance = balance;
            this.internalCalls = i;
            this.externalCalls = e;
        }

        public Subscriber()
        {
        }
    }

    [Serializable]
    public class Subscribers
    {
        public int K;
        public Subscriber[] subs;

        public Subscribers() { }

        public Subscribers(Subscriber[] ar)
        {
            subs = ar;
            K = ar.Length;
        }
    }


    class Program
    {
        static Random ran = new Random();
        static void Main(string[] args)
        {
            int N;
            Console.WriteLine("enter number");
            N = int.Parse(Console.ReadLine());

            Subscriber[] arr = new Subscriber[N];

            for (int i = 0; i < N; i++)
            {
                arr[i] = new Subscriber(ran.Next(), "Vasya" + i, "Pupkin" + i, ran.Next(10, 10001), ran.Next(100, 500), ran.Next(10, 1001));
            }
            Subscribers subscrss = new Subscribers(arr);

            foreach (Subscriber s in subscrss.subs)
            {
                Console.WriteLine(s.ToString());
            }

            XmlSerializer ser = new XmlSerializer(typeof(Subscribers));
            FileStream fs = new FileStream("@../../../../subs.ser", FileMode.Create, FileAccess.ReadWrite);

            ser.Serialize(fs, subscrss);
            Console.WriteLine("success");
            fs.Close();

            FileStream newfs = new FileStream("@../../../../subs.ser", FileMode.Open, FileAccess.ReadWrite);
            Subscribers newsubs = (Subscribers)ser.Deserialize(newfs);

            newfs.Close();

            foreach (Subscriber s in newsubs.subs)
            {
                Console.WriteLine(s.ToString());
            }


            var poor =
                from s in arr
                let s1 = s
                where s1.Equals(false)
                select s1;

            foreach (Subscriber p in poor)
            {
                Console.WriteLine("\n\n\n\n\n\n");
                Console.WriteLine(p.ToString());
            }
        }
    }
}