SoftUni Water Supplies 100%

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

namespace _2.SoftUni_Water_Supplies
{
    class Program
    {
        static void Main(string[] args)
        {
            double totalWater = double.Parse(Console.ReadLine());
            double[] bottles = Console.ReadLine().Split().Select(double.Parse).ToArray();
            double capacity = double.Parse(Console.ReadLine());

            double bottleCapacity = 0;
            double waterSpent = 0;
            double totalWaterSpent = 0;
            int bottlesLeft = 0;
            int insufficiencyPoint = -1;
            double littersNeeded = 0;
            bool even = (totalWater % 2 == 0);

            if (totalWater % 2 == 0)
            {
                for (int bottle = 0; bottle < bottles.Length; bottle++)
                {
                    bottleCapacity = bottles[bottle];
                    if (capacity - bottleCapacity <= totalWater)
                    {
                        waterSpent = capacity - bottleCapacity;
                        totalWaterSpent += waterSpent;
                        bottles[bottle] += waterSpent;
                        totalWater -= waterSpent;
                    }
                    else
                    {
                        insufficiencyPoint = bottle;
                        waterSpent = totalWater;
                        totalWaterSpent += waterSpent;
                        bottles[bottle] += waterSpent;
                        totalWater = 0;
                        bottlesLeft = bottles.Length - bottle;
                        for (int halfFull = insufficiencyPoint; halfFull < insufficiencyPoint + bottlesLeft; halfFull++)
                        {
                            bottleCapacity = bottles[halfFull];
                            littersNeeded += capacity - bottleCapacity;
                        }
                        break;
                    }
                } // end of for
            } //end of if

            else
            {
                for (int bottle = bottles.Length - 1; bottle >= 0; bottle--)
                {
                    bottleCapacity = bottles[bottle];
                    if (capacity - bottleCapacity <= totalWater)
                    {
                        waterSpent = capacity - bottleCapacity;
                        totalWaterSpent += waterSpent;
                        bottles[bottle] += waterSpent;
                        totalWater -= waterSpent;
                    }
                    else
                    {
                        insufficiencyPoint = bottle;
                        waterSpent = totalWater;
                        totalWaterSpent += waterSpent;
                        bottles[bottle] += waterSpent;
                        totalWater = 0;
                        bottlesLeft = bottle + 1;
                        for (int halfFull = insufficiencyPoint; halfFull >= 0; halfFull--)
                        {
                            bottleCapacity = bottles[halfFull];
                            littersNeeded += capacity - bottleCapacity;
                        }
                        break;
                    }
                }//end of for
            }//end of else

            int[] remainingBottlesIndexes = new int[bottlesLeft];

            if (insufficiencyPoint != -1 && even)
            {
                int k = 0;
                for (int bottle = bottles.Length - 1; bottle >= insufficiencyPoint; bottle--)
                {
                    remainingBottlesIndexes[k] = bottle;
                    k++;
                }
                remainingBottlesIndexes = remainingBottlesIndexes.Reverse().ToArray();
            }
            else if (insufficiencyPoint != -1 && !even)
            {

                for (int bottle = 0; bottle < bottlesLeft; bottle++)
                {
                    remainingBottlesIndexes[bottle] = bottle;
                }

                remainingBottlesIndexes = remainingBottlesIndexes.Reverse().ToArray();
            }


            if (bottlesLeft == 0)
            {
                Console.WriteLine("Enough water!");
                Console.WriteLine($"Water left: {totalWater}l.");
            }
            else
            {
                Console.WriteLine("We need more water!");
                Console.WriteLine($"Bottles left: {bottlesLeft}");
                Console.WriteLine("With indexes: " + string.Join(", ", remainingBottlesIndexes)); ;
                Console.WriteLine($"We need {littersNeeded} more liters!");
            }
        }
    }
}