02. The Lift

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

namespace Program
{
    class Program
    {
        static void Main(string[] args)
        {
            int WaitingPeople = int.Parse(Console.ReadLine());
            int[] currentState = Console.ReadLine().Split().Select(int.Parse).ToArray();
            int nondifference = 0;
            for (int i = 0; i < currentState.Length; i++)
            {


                if (currentState[i] >= 4)
                {
                    currentState[i] = 4;
                    WaitingPeople -= currentState[i];

                }
                else if (currentState[i] == 0||currentState[i]<0)
                {
                    int PreviousLeft;
                    PreviousLeft = WaitingPeople;
                    if (PreviousLeft - 4 < 0)
                    {
                        currentState[i] = PreviousLeft;
                    }
                    else currentState[i] = 4;
                    WaitingPeople -= currentState[i];

                }
                else if (currentState[i] < 4)
                {
                    WaitingPeople -= currentState[i];
                    currentState[i] = 4;
                }
            }
            for (int i = 0; i < currentState.Length; i++)
            {
                if (currentState[i]!=4)
                {
                    nondifference++;

                }
            }

            if (WaitingPeople <= 0&&nondifference!=0)
            {
                Console.WriteLine("The lift has empty spots!");
                Console.WriteLine(String.Join(" ", currentState));

            }
            else if (WaitingPeople>0&&nondifference==0)
            {
                Console.WriteLine($"There isn't enough space! {WaitingPeople} people in a queue!");
                Console.WriteLine(String.Join(" ", currentState));
            }
            else if (WaitingPeople <= 0 && nondifference == 0)
            {
                Console.WriteLine(String.Join(" ", currentState));
            }
        }
    }
}