Java: Towers of Hanoi Variant

Consider the following variant of the towers of Hanoi problem, There are 2n discs of increasing size stored on the three poles. Initially all of the discs with odd size (1, 3,..., 2n-1) are piled on the left pole from top to bottom in increasing order of size; all of the discs with even size (2, 4, ..., 2n) are piled on the right pole. Write a program to provide instructions for moving the odd discs to the right pole and the even discs to the left pole, obeying the same rules as for towers of Hanoi (The towers of Hanoi provided below)

public class TowersOfHanoi {

// print out instructions for moving n discs to
// the left (if left is true) or right (if left is false)
public static void moves(int n, boolean left) {
if (n == 0) return;
moves(n-1, !left);
if (left) StdOut. println(n + " left");
else StdOut. println(n + " right");
moves(n-1, !left);
}

public static void main(String[] args) {
int n = Integer. parseInt(args[0]);
moves(n, true);
}

}

Ihave a music player on my phone. i can buy songs, add them to playlists and play them. obviously it would be redundant to store each song in each playlist; each playlist is just a list of pointers to the songs. for this lab you will simulate this behavior. your program will need to have options to: add songs to the system library (you will store the text of the first line of the song, rather than the audio) add playlists add songs to a playlist list playlists play a playlist list all of the songs in the library with a count of how many times each song has been played remove a song from a playlist remove a playlist remove a song from the library (and thus from all playlists that contain it) note that we will not be checking many error cases. in real programming this would be bad, you should usually try to recognize and respond to as many types of errors as you can. in the context of class we are trying to acquaint you with as many concepts as possible, so for the sake of educational efficiency we will not be checking most errors in this lab, you may assume that your user provides correct input. you may add all appropriate error testing if you wish, but we will not be testing for it.

Consider the following statements, then select one of the answers below: the signal() function shown below registers "sig_handler()" as the signal handler function for the sigkill signal, without the complexity of using when the sigkill signal is sent to a process running this code, by a user typing "kill -kill ", where the correct process id is used for to target the process, sig_handler() will be executed.

All of the following are characteristics that must be contained in any knowledge representation scheme except