OwnBusiness

using System;

namespace OwnBusiness
{
    class Program
    {
        static void Main(string[] args)
        {
            //input
            var a = int.Parse(Console.ReadLine());
            var b = int.Parse(Console.ReadLine());
            var c = int.Parse(Console.ReadLine());
            var volumeOfRoom = a * b * c;
            var sumOfAlPc = 0;
            var temp = 0;
            var command = Console.ReadLine();
            var check = true;
            //logic

            while (command != "Done")
            {
                temp = int.Parse(command);
                sumOfAlPc += temp;
                if (sumOfAlPc>volumeOfRoom)
                {
                    check = false;
                    var diff = sumOfAlPc - volumeOfRoom;
                    Console.WriteLine($"No more free space! You need {diff} Cubic meters more.");
                    break;
                }

                command = Console.ReadLine();
            }
            if (check)
            {
                Console.WriteLine($"{volumeOfRoom - sumOfAlPc} Cubic meters left.");
            }
            //output
        }
    }
}