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Stack Class in Java

Last Updated: 05 September 2023

Java Collection framework provides a Stack class that models and implements a Stack data structure. The class is based on the basic principle of last-in-first-out. In addi...read more

Last Updated: 13 April 2023

Stacks are a type of container adaptors with LIFO(Last In First Out) type of working, where a new element is added at one end (top) and an element is removed from that end ...read more

Stack

STL

C++

cpp-containers-library

cpp-stack

cpp-stack-functions

Evaluation of Postfix Expression

Last Updated: 27 March 2023

Given a postfix expression, the task is to evaluate the postfix expression.Postfix expression: The expression of the form "a b operator" (ab+) i.e., when a pair of operand...read more

Amazon

Stack

expression-evaluation

DSA

Program for Tower of Hanoi Algorithm

Last Updated: 16 February 2023

Tower of Hanoi is a mathematical puzzle where we have three rods (A, B, and C) and N disks. Initially, all the disks are stacked in decreasing value of diameter i.e., the ...read more

Basic Coding Problems

Largest Rectangular Area in a Histogram using Stack

Last Updated: 11 September 2023

Find the largest rectangular area possible in a given histogram where the largest rectangle can be made of a number of contiguous bars whose heights are given in an array....read more

Convert Infix expression to Postfix expression

Last Updated: 17 October 2023

Write a program to convert an Infix expression to Postfix form.Infix expression: The expression of the form "a operator b" (a + b) i.e., when an operator is in-between eve...read more

expression-evaluation

DSA

Merge Overlapping Intervals

Last Updated: 19 October 2023

Given a set of time intervals in any order, our task is to merge all overlapping intervals into one and output the result which should have only mutually exclusive interva ...read more

Implement Stack using Queues

Last Updated: 19 July 2023

Given a Queue data structure that supports standard operations like enqueue() and dequeue(). The task is to implement a Stack data structure using only instances of Queue ...read more

Next Greater Element (NGE) for every element in given Array

Last Updated: 29 September 2023

Given an array, print the Next Greater Element (NGE) for every element.The Next greater Element for an element x is the first greater element on the right side of x in the...read more

Check for Balanced Brackets in an expression (well-formedness)

Last Updated: 04 May 2023

Given an expression string exp, write a program to examine whether the pairs and the orders of "{", "}", "(", ")", "[", "]" are correct in the given expression.Example:Inp...read more

Inorder Tree Traversal without Recursion

Last Updated: 02 October 2023

In this post, we have seen in detail about the Inorder traversal and how it is implemented using recursion.Here in this post, we will discuss methods to implement inorder ...read more

Last Updated: 10 July 2023

The problem is opposite of this post. We are given a stack data structure with push and pop operations, the task is to implement a queue using instances of stack data stru...read more

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