02. SoftUni Water Supplies View code

using System;
using System.Collections.Generic;
using System.Linq;
namespace WaterSupply
{
    class WaterSupply
    {
        static void Main()
        {
            double litersOfWater = long.Parse(Console.ReadLine());
            double[] arr = Console.ReadLine().Split().Select(double.Parse).ToArray();
            uint bottleCapacity = uint.Parse(Console.ReadLine());

            double litersToFill = arr.Length * bottleCapacity - arr.Sum();

            if (litersOfWater >= litersToFill)
            {
                Console.WriteLine("Enough water!");
                Console.WriteLine("Water left: {0}l.", litersOfWater - litersToFill);
            }
            else
            {
                List<long> indexesOfLeft = new List<long>();

                if (litersOfWater % 2 == 0)
                {
                    for (int i = 0; i < arr.Length; i++)
                    {
                        if (arr[i] < bottleCapacity)
                        {
                            double diff = bottleCapacity - arr[i];

                            if (litersOfWater >= diff)
                            {
                                litersOfWater = litersOfWater - diff;
                                arr[i] += diff;
                            }
                            else
                            {
                                indexesOfLeft.Add(i);
                            }
                        }
                    }
                }
                else
                {
                    for (int i = arr.Length - 1; i >= 0; i--)
                    {
                        if (arr[i] < bottleCapacity)
                        {
                            double diff = bottleCapacity - arr[i];

                            if (litersOfWater >= diff)
                            {
                                litersOfWater = litersOfWater - diff;
                                arr[i] += diff;
                            }
                            else
                            {
                                indexesOfLeft.Add(i);
                            }
                        }
                    }
                }
                Console.WriteLine("We need more water!");
                Console.WriteLine("Bottles left: {0}", indexesOfLeft.Count);
                Console.WriteLine("With indexes: {0}", string.Join(", ", indexesOfLeft));
                Console.WriteLine("We need {0} more liters!", arr.Length * bottleCapacity - arr.Sum() - litersOfWater);
            }
        }
    }
}