06. Building (solutions with or not ternary operator)

import java.util.Scanner;

public class Building {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int floorCount = Integer.parseInt(scanner.nextLine());
        int flatFloorCount = Integer.parseInt(scanner.nextLine());
        String appendix;

        for (int floor = floorCount; floor > 0; floor--) {
            if (floor == floorCount) {
                appendix = "L";
            } else if (floor % 2 == 1) {
                appendix = "A";
            } else {
                appendix = "O";
            }

            for (int flatFloor = 0; flatFloor < flatFloorCount; flatFloor++) {
                System.out.printf("%s%d%d ", appendix, floor, flatFloor);
            }
            System.out.println();
        }
    }
}

ИЛИ:

import java.util.Scanner;

public class Building {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int floorCount = Integer.parseInt(scanner.nextLine());
        int flatFloorCount = Integer.parseInt(scanner.nextLine());
        String appendix;

        for (int floor = floorCount; floor > 0; floor--) {
            appendix = floor == floorCount ? "L" : floor % 2 == 1 ? "A" : "O";
            for (int flatFloor = 0; flatFloor < flatFloorCount; flatFloor++) {
                System.out.printf("%s%d%d ", appendix, floor, flatFloor);
            }
            System.out.println();
        }
    }
}