The Lift

import java.util.Arrays;
import java.util.Scanner;

public class TheLift {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int people = Integer.parseInt(scanner.nextLine());
        String input = scanner.nextLine();

        int[] wagons = Arrays
                .stream(input.split(" "))
                .mapToInt(Integer::parseInt)
                .toArray();

        int maxCapacity = 4;
        boolean noMorePeople = false;

        for (int i = 0; i < wagons.length; i++) {
            int currentWagon = wagons[i];

            if (people - (maxCapacity - currentWagon) == 0) {
                people -= maxCapacity - currentWagon;
                wagons[i] = 4;
                noMorePeople = true;
                break;
            } else if (people - (maxCapacity - currentWagon) < 0) {
                wagons[i] = people;
                people = 0;
                noMorePeople = true;
                break;
            } else {
                people -= maxCapacity - currentWagon;
                wagons[i] = 4;
            }
        }
        boolean emptySpaces = false;

        for (int i = 0; i < wagons.length; i++) {
            if (wagons[i] < 4) {
                emptySpaces = true;
                break;
            }
        }
        if (noMorePeople && emptySpaces) {
            System.out.println("The lift has empty spots!");
        } else if (people > 0 && !emptySpaces) {
            System.out.printf("There isn't enough space! %d people in a queue!%n", people);
        }
        System.out.print(Arrays.toString(wagons).replaceAll("[\\[\\]]", "").
                replaceAll(", ", " "));
    }
}