For given two sorted stacks (of integer type) A (maximum value on top) and B (minimum value on top), write a Java method that creates a stack that is sorted (minimum value on top). Allowable stack operations are pop(), push(), size() and top(). Using arrays is not allowed.
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- Write a java program that allows the user: 1- Implement a queue in an array. 2- Enter the following numbers 3,4,6,7,2,1,0 in the queue. 3- Reverse the queue elements using a stack to display them in this order (i.e. 0,1,2,7,6,4,3).Write a Java program that allow the user 1.Implement a queue in an array2. Enter the following number 3,4,6,7,2,1,0) in the queue 3. Reverse the queue element using a stack to display them in this order (i.e. 0,1,2,7,6,4,3).Implement a queue with three stacks so that, in the worst-case scenario, each queue operation requires a fixed number of stack operations. High level of difficulty alert.
- Write a Java program to implement a stack using an array. The program should have methods to push an element onto the stack, pop an element from the stack, and check if the stack is empty. Additionally, implement a method to return the size of the stack. Provide an explanation of the code and its time and space complexity.In Java please create a generic stack code and implement these methods peek() returns a reference to the item at the top of the stack without removing it from the stack contains(T t) is a boolean method that returns true if the stack contains t, the parameter, otherwise returns false. The stack contains t if at least one T on the stack is equal to t using the equals() method. Note that there is always an available equals() method in Java, because Object, the common parent of all classes, contains one. Implement this method without using the contains()method of the list.Implement a stack with a single queue so that each stackoperations takes a linear number of queue operations. Hint : To delete an item, get allof the elements on the queue one at a time, and put them at the end, except for the lastone which you should delete and return. (
- Write a non-recursive Java method for printing all permutations of the numbers {1,2, ..., n}Hint: use an explicit stackpublic class QueueByStack<E> {Stack<E> a = new Stack<>();Stack<E> b = new Stack<>(); public int size() {//write code here} public boolean isEmpty() {//write code here} public void eneque(E e) {//write code here} public E deque() {//write code here} public E first() {//write code here} @Overridepublic String toString() {//write code here}}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: Given an empty stack in which the values A, B, C, D, E, F are pushed on the stack in that order but can be popped at any time, give a sequence of push and pop operations which results in pop()ed order of BADECFJava Consider the following class definition for an array-based stack implementation:pubic class Stack { private int[] m_array; private int m_index; public Stack(int cap) { m_array = new int[cap]; m_index = 0; } public void push(int v) { if (m_index == m_array.length) throw new RuntimeException("push attempted on a full stack"); else { m_array[m_index] = v; m_index++; } }} Follow the steps below to create a class SpecialStack with required instance variables and methods.a. Make sure that the SpecialStack class inherits from Stack. b. Declare two private instance variables: a boolean variable m_multiply, and an int variable m_number.c. Create a constructor that takes three parameters: an int cap, a boolean multiply, and an int number.d. The constructor should call the constructor of the super class and initialize the instance variables properly.e. Override the push method so it verifies if m_multiply is…
- Modify the Java class for the abstract stack type shown belowto use a linked list representation and test it with the same code thatappears in this chapter. class StackClass {private int [] stackRef;private int maxLen,topIndex;public StackClass() { // A constructorstackRef = new int [100];maxLen = 99;topIndex = -1;}public void push(int number) {if (topIndex == maxLen)System.out.println("Error in push–stack is full");else stackRef[++topIndex] = number;}public void pop() {if (empty())System.out.println("Error in pop–stack is empty"); else --topIndex;}public int top() {if (empty()) {System.out.println("Error in top–stack is empty");return 9999;}elsereturn (stackRef[topIndex]);}public boolean empty() {return (topIndex == -1);}}An example class that uses StackClass follows:public class TstStack {public static void main(String[] args) {StackClass myStack = new StackClass();myStack.push(42);myStack.push(29);System.out.println("29 is: " + myStack.top());myStack.pop();System.out.println("42 is:…Describe how we might efficiently implement a Queue as a pair of Stacks, called a “stack pair.” (Hint: Think of one of the stacks as the headof the queue and the other as the tail.)implement a queue with 2 stacks so that each queue operation take a constant amortized number of stack operations (using java)