Data Structures and Algorithms in Java
6th Edition
ISBN: 9781119278023
Author: Michael T. Goodrich; Roberto Tamassia; Michael H. Goldwasser
Publisher: Wiley Global Education US
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Chapter 6, Problem 5R
Explanation of Solution
Recursive method for removing all the elements in a stack:
An example code for a recursive method for removing all the elements in a stack is shown below.
//Import necessary header files
import java.util.*;
//Create a class
public class EmptyStack
{
//Define a method to empty the stack
public static Stack empty(Stack<Integer> st)
{
//Check whether stack is empty
if (st.isEmpty())
//Return the value
return st;
//Perform pop operation
st...
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Students have asked these similar questions
Each recursion causes a new activation frame to be placed on the stack.true of false?
Can you show changes to the code on how we can have it recursively count the numbers in the list? For example cntItems [1,2 3] = 3.
Write a recursive function that finds the minimum value in an ArrayList.
Your function signature should be
public static int findMinimum(ArrayList<Integer>)
One way to think of finding a minimum recursively is to think “the minimum number is either the last element in the ArrayList, or the minimum value in the rest of the ArrayList”.
For example, if you have the ArrayList
[1, 3, 2, 567, 23, 45, 9],
the minimum value in this ArrayList is either 9 or the minimum value in [1, 3, 2, 567, 23, 45]
================================================
import java.util.*;
public class RecursiveMin{public static void main(String[] args){Scanner input = new Scanner(System.in);ArrayList<Integer> numbers = new ArrayList<Integer>();while (true){System.out.println("Please enter numbers. Enter -1 to quit: ");int number = input.nextInt();if (number == -1){break;}else {numbers.add(number);}}
int minimum = findMinimum(numbers);System.out.println("Minimum: " + minimum);}public static int…
Chapter 6 Solutions
Data Structures and Algorithms in Java
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- Write a recursive function that finds the minimum value in an ArrayList. Your function signature should be public static int findMinimum(ArrayList<Integer>) One way to think of finding a minimum recursively is to think “the minimum number is either the last element in the ArrayList, or the minimum value in the rest of the ArrayList”. For example, if you have the ArrayList [1, 3, 2, 567, 23, 45, 9], the minimum value in this ArrayList is either 9 or the minimum value in [1, 3, 2, 567, 23, 45] Hint:The trick is to remove the last element each time to make the ArrayList a little shorter. import java.util.*; public class RecursiveMin{public static void main(String[] args){Scanner input = new Scanner(System.in);ArrayList<Integer> numbers = new ArrayList<Integer>();while (true){System.out.println("Please enter numbers. Enter -1 to quit: ");int number = input.nextInt();if (number == -1){break;}else {numbers.add(number);}} int minimum =…arrow_forwardIn what instances do you think it’s impractical to use recursion over loops?arrow_forwardPlease explain Q# 1, A list operation that produces one summary item result is called Group of answer choices A. Map B. Fold C. Filter D. Iterate Q#2, What is an accumulator? Group of answer choices A. An optional argument to a helper method B. An argument to a recursive method tracks information over the course of the recursion C. None of the above D. A recursive method that returns an accumulated valuearrow_forward
- Write a recursive method that takes as input a reference to the curhead of a linked list storing integers and returns the smallest value in the list. You may assume that list will contain at least one element. Use C#arrow_forwardDefine a recursive finction called arraySum to find sum of elements in a list.arrow_forwardSolve it and if u need to use code do it by java language 5. Write a non-recursive Java method for printing all permutations of the numbers {1,2, n} Hint: use an explicit stackarrow_forward
- By, using java. give an reverse recursivefunction to print elements in arrayarrow_forwardWrite a recursive method to print all the permutation of a string. For example, for the string “abc” , the permutation is [abc, acb, bac, bca, cab, cba]arrow_forwardWhat is a recursive method? What is an infinite recursion? Explain and demonstrate with examples. Implement the search (element) in a list using recursion. Explain it with at least 3 different java examplesarrow_forward
- Create an iterative technique for reverse-engineering a string. Explain why you would not typically handle this issue using recursion.arrow_forwardWrite and test a Java/Python recursive method for finding the minimum element in an array, A, of n elements. What the running time? Hint: an array of size 1 would be the stop condition. The implementation is similar to linearSum method in lecture 5 examples. You can use the Math.min method for finding the minimum of two numbers.arrow_forwardRecursion and list processing Write a maxel that returns the maximum element in an arbitrarily complex list (e.g., list that may contain lists, which may contain lists, and so on). For example, (maxel '(((5)) (9 (3)) 7)-> 9arrow_forward
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