gistfile1.txt

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

namespace Console.MathTester
{
    class Program
    {
        static void Main(string[] args)
        {
            int N = 1000_000;

            var sw = Stopwatch.StartNew();
            float[] Accounts = new float[N];
            Random randNum = new Random();
            for (int i = 0; i < Accounts.Length; i++)
            {
                Accounts[i] = randNum.Next(10, 100_000);
            }
            var BaseLevel = (float)Accounts.Sum() / Accounts.Count();


            for (int i = 0; i < 100; i++)
            {

                var surplus = ProcessFatAccounts(Accounts, BaseLevel);
                ProcessPoorAccounts(Accounts, BaseLevel, surplus);
                System.Console.WriteLine($"[ {i}] снято с  жирных счетов #{surplus}");

            }
            System.Console.WriteLine($"elapsed {sw.Elapsed}");

        }

        private static float ProcessFatAccounts(float[] Accounts, float BaseLevel)
        {
            float Sum = 0;

            for (int i = 0; i < Accounts.Length; i++)
            {
                var mm = Accounts[i];
                if (mm > BaseLevel)
                {
                    float f = (float)Math.Pow(mm / BaseLevel, 1.3);
                    if (Accounts[i] - f > BaseLevel)
                    {
                        Accounts[i] -= f;
                        Sum += f;
                    }
                }
            }
            return Sum;
        }

        private static void ProcessPoorAccounts(float[] Accounts, float BaseLevel, float Benefits)
        {
            float SmallAmountLimit(float ff) => ff > 20 ? 20 : ff;

            float AllFactors = 0;
            for (int i = 0; i < Accounts.Length; i++)
            {
                var mm = Accounts[i];
                if (mm < BaseLevel) AllFactors += SmallAmountLimit(BaseLevel / mm);

            }
            var AmountToAdd = Benefits / AllFactors;

            for (int i = 0; i < Accounts.Length; i++)
            {
                var mm = Accounts[i];
                if (mm < BaseLevel)
                {
                    var f = SmallAmountLimit(BaseLevel / mm) * AmountToAdd;
                    Accounts[i] += f;
                }

            }
        }

    }


}