For the code below, draw a picture of the program stack when the function partition() is called the 2nd time.
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2. For the code below, draw a picture of the
# extracted from suquant's reply at
# https://stackoverflow.com/questions/18262306/quicksort-with-python
def partition(array, begin, end):
pivot = begin
for i in range(begin+1, end+1):
if array[i] <= array[begin]:
pivot += 1
array[i], array[pivot] = array[pivot], array[i]
array[pivot], array[begin] = array[begin], array[pivot]
return pivot
def quicksort(array, begin, end):
if begin >= end:
return
pivot = partition(array, begin, end)
quicksort(array, begin, pivot-1)
quicksort(array, pivot+1, end)
# added calling code
if __name__ == "__main__":
mylist = [8, 2, 17, 4, 12]
quicksort(mylist, 0, 4)
Step by step
Solved in 2 steps with 1 images
- 1. For the code below, draw a picture of the program stack when the function partition() is called the first time. You only have to draw the part of the stack for quicksort() and partition(). # extracted from suquant's reply at # https://stackoverflow.com/questions/18262306/quicksort-with-python def partition(array, begin, end): pivot = begin for i in range(begin+1, end+1): if array[i] <= array[begin]: pivot += 1 array[i], array[pivot] = array[pivot], array[i] array[pivot], array[begin] = array[begin], array[pivot] return pivot def quicksort(array, begin, end): if begin >= end: return pivot = partition(array, begin, end) quicksort(array, begin, pivot-1) quicksort(array, pivot+1, end) # added calling code if __name__ == "__main__": mylist = [8, 2, 17, 4, 12] quicksort(mylist, 0, 4)Write a program to implement a Stack using array. In order to implement the stack, programfor following stack operations has to be written: • void push(int): to insert data onto the stack.• Int pop(): to remove and return the last inserted element from the stack.• Int top(): Returns the last inserted element without removing it.• int Size(): Returns the number of elements stored in the stack.• int IsEmptyStack(): Indicates whether any elements are stored in the stack or not.• int IsFullStack(): Indicates whether the stack is full or not.1. In a linked stack the bottom of the stack is in the beginning of the list and the top of the stack is at the end of the list. 2. In the worst case a sequential search of an array with N elements is O(N). 3. In the best case, a sequential search of an array with 1,000 elements requires this many comparisons: ________________. 4. Java programmers can define their own exception classes. A. True B. False 5. If a recursive method does not have a base case: A. a syntax error is identified.B. an exception will be thrown. C. it will operate more efficiently.D. it will run forever.
- Write a program which should contain two stacks (using class template) of static arrays of size 5 each, elements of array should be of integer (int) type. User will push values in first stack, when a value will be popped from first stack it should be pushed to second stack. For each stack you have to check stack overflow and underflow conditions. User may remove an element from second stack as well.Write a program for Stack (Array-based or linked list-based) in Python. Test the scenario below with the implementation and with the reasoning of the answer. Make comments with a short description of what is implemented. Include source codes and screen-captured outputs. Stack: A letter means doing a push operation and an asterisk means doing a pop operation in the below sequence. Give the sequence of letters that are returned by the pop operations when this sequence of operations is performed on an initially empty stack. A*BCE**F*GH***I*Short answer: Answer the following in your own words: 1) Your friend says they implemented a stack as a linked list with reference pointers to both a head and the tail node (i.e. they implemented a stack as a double endedlinked list). They said this significantly improved the performance for all functions (push, pop, search, and update). Are they correct? Why or why not?
- This is what i have for array stack to far: from exceptions import Emptyclass ArrayStack:"""LIFO Stack implementation using a Python list as underlying storage."""def __init__(self):"""Create an empty stack."""self._data = [] # nonpublic list instancedef __len__(self):"""Return the number of elements in the stack."""return len(self._data)def is_empty(self):"""Return True if the stack is empty."""return len(self._data) == 0def push(self, e):"""Add element e to the top of the stack."""self._data.append(e) # new item stored at end of listdef top(self):"""Return (but do not remove) the element at the top of the stack.Raise Empty exception if the stack is empty."""if self.is_empty():raise Empty('Stack is empty')return self._data[-1] # the last item in the listdef pop(self):"""Remove and return the element from the top of the stack (i.e., LIFO).Raise Empty exception if the stack is empty."""if self.is_empty():raise Empty('Stack is empty')return self._data.pop() # remove last item from…1. Here is how the built-in sum function can be combined with Python’s comprehension syntax to compute the sum of all numbers in an n x n data set, represented as a list of lists: sum(sum(subset) for subset in data) Group of answer choices True False 2. Which of the following statements are correct? Group of answer choices a) A stack is a collection of objects that are inserted and removed according to the Last-in First-out principle; whereas, queue is based on the First-in First-out principle. b) A queue would be a logical choice for a data structure for a Web server responding to requests. c) Unlike arrays, linked list elements are not stored at a contiguous location; the elements are linked using pointers.Someone tries to fix the stack based buffer overflow problem as follows, is it secure now? why?why not? Are there any other issues within the function's implementation below? Please explain your reasoning. int bof(char *str, int size) { char *buffer = (char *) malloc(size); strcpy(buffer, str); return 1; }
- Write a C++ program that allows a user to enter a maximum of 50 characters in a stack object. Then have the program sort the stack contents in increasing order. For example,if the stack’s contents are initially D, E, A, and B, its final contents are A, B, D, and E.Q: Consider an empty stack STK of size 5 (array-based implementation). What will be the output after applying the following stack operations? Draw a diagram in support of your answer. How many elements are there in the stack at the end of the processing? POP(), PUSH(9), PUSH(11), PUSH(25), POP(), POP(), PUSH(42), POP(), PUSH(3), PUSH(7), PUSH(30), PUSH(15), PUSH(54),POP(), PUSH(50)In order to store linked lists in memory, two common approaches are utilized: the use of static arrays or the allocation of dynamically divided memory portions. What are the differences between each strategy?