Building - numbers

# include <iostream>
using namespace std;
#include <iomanip>
#include <math.h>
#include <cmath>
#include <string>

int main()
{
    int floors;
    cin >> floors;
    int rooms;
    cin >> rooms;
    int counter = floors;
    char letter;
    while (counter > 0) {
        if (floors == 1) {
            letter = 'L';
            for (int i = 0; i < rooms; i++) {
                cout << letter << counter << i << " ";
            }
            break;
        }
        if (counter == floors) {
            letter = 'L';
            for (int i = 0; i < rooms; i++) {
                cout << letter << counter << i << " ";
            }
            counter -= 1;
        }
        cout << endl;
        if (counter % 2 == 1) {
            letter = 'A';
            for (int i = 0; i < rooms; i++) {
                cout << letter << counter << i << " ";
            }
        }
        else {
            letter = 'O';
            for (int i = 0; i < rooms; i++) {
                cout << letter << counter << i << " ";
            }
        }
        counter -= 1;
    }
    return 0;
}