Building.java

package NestedLoops;

import java.util.Scanner;

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

        int floors = Integer.parseInt(scanner.nextLine());
        int rooms = Integer.parseInt(scanner.nextLine());

        for (int i = floors; i > 0 ; i--) {
            for (int j = 0; j < rooms ; j++) {
                if(i == floors){
                System.out.printf("L%d%d ",i,j);
                }else if(i % 2 == 0){
                    System.out.printf("O%d%d ",i,j);
                }else {
                    System.out.printf("A%d%d ",i,j);
                }
            }

            System.out.println();

        }
    }
}