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import getpass

age = getpass.getpass('Enter your age:')

print("Entered age is: " + age)

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public class AVLTree {

  private MyTreeNode root;

  public AVLTree() {
    this.root = null;
  }

  public void add(Integer data) throws Exception {
    this.root = add(root, data);

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public class MyBinarySearchTree {

  private MyTreeNode root;

  public MyBinarySearchTree() {
    this.root = null;
  }

  public void add(Integer data) throws Exception {
    this.root = add(root, data);

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public class MyBinarySearchTree {

  private MyTreeNode root;
  private int size;

  public MyBinarySearchTree() {
    this.root = null;
    size = 0;
  }

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public class ExpressionTree {
  public static int eval(MyTreeNode root) {
    return 0;
  }
}

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# given a list, remove successive duplicate elements

def remove_succ_lst(lst):
    result = [lst[0]]
    prev = lst[0]
    for curr in lst:
        if ( prev != curr ):
           result = result + [curr]

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#
# fold

def sum_nums(lst):
    sum = 0
    for el in lst:
        sum = sum + el
    return sum

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Machine Problem 3 - Parsing Poetry Packets

Data on the internet are broken up and passed around in what are called "packets":

On the Internet, the network breaks an e-mail message into parts of a certain size in bytes. These are the packets. Each packet carries the information that will help it get to its destination -- the sender's IP address, the intended receiver's IP address, something that tells the network how many packets this e-mail message has been broken into and the number of this particular packet. - Read the whole article at HowStuffWorks

In this MP, you're going to parse a "network packet capture" (a listing of packets), reassemble corresponding sets of packets into the original "messages" sent, and display the messages in a human-readable format.

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CMSC11 Lab Exercise 11 – Lists

Create the following functions. Don’t forget the design recipe! I’ll be looking for the following:

• Signature, purpose, stub
• Examples
• Template

---

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#
#
# fold


# map
# create a duplicate of the given list
def dup(lst):
    result = [] 
    for el in lst: