Exercise 6.21

import java.util.Scanner;

public class Exercise6_21 {
  public static void main(String[] args) {
    Scanner in = new Scanner(System.in);
    System.out.print("Enter the number of balls to drop: ");
    int balls = in.nextInt();
    System.out.print("Enter the number of slots in the bean machine: ");
    int slotNum = in.nextInt();
    int[] slots = new int[slotNum];
    for (int i = 0; i < balls; i++) {
      int count = slotNum - 1;
      int rights = 0;
      String path = "";
      while (count > 0) {
        double choice = Math.floor(Math.random() * 2);
        if (choice == 0) {
          path += "L";
        } else {
          path += "R";
          rights++;
        }
        count--;
      }
      slots[rights]++;
      System.out.println(path);
    }
    while (balls > 0) {
      String ballPlace = "";
      for (int i = 0; i < slots.length; i++) {
        if (slots[i] == balls) {
          ballPlace += "O";
          slots[i]--;
        } else {
          ballPlace += " ";
        }
      }
      balls--;
      System.out.println(ballPlace);
    }
  }
}