Deque or Double Ended Queue is a generalized version of Queue data structure that allows insert and delete at both ends. Operations on Deque: Mainly… Read More

# Category Archives: Queue

We have discussed efficient implementation of k stack in an array. In this post, same for queue is discussed. Following is the detailed problem statement.Create… Read More

There are given n ropes of different lengths, we need to connect these ropes into one rope. The cost to connect two ropes is equal… Read More

Given a number n, write a function that generates and prints all binary numbers with decimal values from 1 to n. Examples: Input: n =… Read More

Priority Queue is an extension of queue with following properties. Every item has a priority associated with it. An element with high priority is dequeued… Read More

In the previous post, we introduced Queue and discussed array implementation. In this post, linked list implementation is discussed. The following two main operations must… Read More

Like Stack, Queue is a linear structure which follows a particular order in which the operations are performed. The order is First In First Out (FIFO).… Read More

Given a Binary tree and a key in the binary tree, find the node right to the given key. If there is no node on… Read More

Given a stream of characters, find the first non-repeating character from stream. You need to tell the first non-repeating character in O(1) time at any… Read More

There are two conventions to define the height of a Binary Tree 1) Number of nodes on the longest path from the root to the deepest… Read More

Given Linked List Representation of Complete Binary Tree, construct the Binary tree. A complete binary tree can be represented in an array in the following… Read More

Suppose there is a circle. There are n petrol pumps on that circle. You are given two sets of data. The amount of petrol that… Read More

The problem is opposite of this post. We are given a Queue data structure that supports standard operations like enqueue() and dequeue(). We need… Read More

Given an array of non-negative integers. Find the largest multiple of 3 that can be formed from array elements. For example, if the input array is… Read More