Qualcomm

120+ posts

Last Updated: 12 December 2024

In this article, the Linked List implementation of the queue data structure is discussed and implemented. Print '-1' if the queue is empty.A ...read more

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Deletion in Binary Search Tree (BST)

Last Updated: 05 December 2024

Given a BST, the task is to delete a node in this BST, which can be broken down into 3 scenarios:Case 1. Delete a Leaf Node in BST Case 2. D...read more

Binary Search Algorithm - Iterative and Recursive Implementation

Last Updated: 04 September 2024

Binary Search Algorithm is a searching algorithm used in a sorted array by repeatedly dividing the search interval in half. The idea of bina...read more

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Quick Sort

Last Updated: 20 December 2024

QuickSort is a sorting algorithm based on the Divide and Conquer that picks an element as a pivot and partitions the given array around the ...read more

Merge Sort - Data Structure and Algorithms Tutorials

Last Updated: 02 January 2025

Merge sort is a sorting algorithm that follows the divide-and-conquer approach. It works by recursively dividing the input array into sma...read more

Longest Palindromic Substring

Last Updated: 01 September 2024

Given a string str, the task is to find the longest substring which is a palindrome. If there are multiple answers, then return the first ap...read more

Sieve of Eratosthenes

Last Updated: 08 October 2024

Given a number n, print all primes smaller than or equal to n. It is also given that n is a small number.Example:Input : n =10Output : 2 3 5...read more

Find duplicates in O(n) time and O(n) extra space

Last Updated: 24 December 2024

Given an array arr[] of n elements that contains elements from 0 to n-1, with any of these numbers appearing any number of times. The task i ...read more

Sort an array of 0s, 1s and 2s - Dutch National Flag Problem

Last Updated: 14 October 2024

Given an array arr[] consisting of only 0s, 1s, and 2s. The task is to sort the array, i.e., put all 0s first, then all 1s and all 2s in las...read more

Check if a Binary Tree is BST or not

Last Updated: 14 January 2025

Given the root of abinary tree. Check whether it is a Binary Search Tree or not. A Binary Search Tree (BST) is a node-based binary tree data...read more

Level Order Traversal (Breadth First Search or BFS) of Binary Tree

Last Updated: 13 January 2025

Level Order Traversal technique is a method to traverse a Tree such that all nodes present in the same level are traversed completely before...read more

Count set bits in an integer

Last Updated: 11 April 2023

Write an efficient program to count the number of 1s in the binary representation of an integer.Examples :Input : n = 6Output : 2Binary repr...read more

Reverse a Linked List

Last Updated: 15 January 2025

Given a linked list, the task is to reverse the linked list by changing the links between nodes.Examples:Input: head: 1 - 2 - 3 - 4 - NULLOu...read more

Find Middle of the Linked List

Last Updated: 04 September 2024

Given a singly linked list, the task is to find the middle of the linked list. If the number of nodes are even, then there would be two midd...read more

Find the Missing Number

Last Updated: 28 November 2024

Given an array arr[] of size n-1 with integers in the range of [1, n], the task is to find the missing number from the first n integers.Note ...read more

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