Box Stacking Problem

Given a set of rectangular 3D boxes, create a stack of boxes which is as tall as possible. A box can be placed on top of another box if the dimensions of the 2D base of the lower box are each strictly larger than those of the 2D base of the higher box. Multiple instances …

Implement a Queue using Stack Data Structure

In this post, we will see how to implement a queue using stack data structure in C++ and Java. In other words, design a queue that supports enqueue and dequeue operations using standard push and pop operations of the stack.