WaterSupply

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

class WaterSupply
{
    static void Main(string[] args)
{
        var totalWater = double.Parse(Console.ReadLine());
        var items = Console.ReadLine().Split(' ').Select(double.Parse).ToArray();
        var itemCapacity = double.Parse(Console.ReadLine());

        var usedWater = 0d;
        var indexes = new List<int>();
        var index = totalWater % 2 != 0 ? items.Length - 1 : 0;
        var count = 0;

        while (count < items.Length)
        {
            usedWater += itemCapacity - items[index];
            indexes.Add(usedWater > totalWater ? index : -1);
            count++;
            index += totalWater % 2 != 0 ? -1 : 1;
        }
        if (usedWater > totalWater)
        {
            indexes.RemoveAll(p => p == -1);
            Console.WriteLine("We need more water!");
            Console.WriteLine($"Bottles left: {indexes.Count}");
            Console.WriteLine($"With indexes: {string.Join(", ", indexes)}");
            Console.WriteLine($"We need {usedWater - totalWater} more liters!");
            return;
        }
        Console.WriteLine("Enough water!");
        Console.WriteLine($"Water left: {totalWater - usedWater}l.");
    }
}