A bit flip of a number x is choosing a bit in the binary representation of x and flipping it from either 0 to 1 or 1 to 0. Given two integers start and goal, return the minimum number of bit flips to…
Author: Anirudh Khurana
Anirudh Khurana
Anirudh Khurana is the founder of Code and Debug, an Indian EdTech platform that helps students and working professionals crack coding interviews and move into data and AI roles. He teaches DSA, Python, SQL, data engineering and machine learning through live bootcamps and his YouTube channel, Code and Debug, which has over 50,000 subscribers. Every guide on this blog is written or reviewed by him and tested with real code.
Welcome to our detailed guide on bit manipulation problems! If you’re preparing for coding interviews or just want to strengthen…
Given a doubly linked list. Your task is to reverse the doubly linked list and return its head. Here’s the [Problem Link] to…
What is a Doubly Linked List? A doubly linked list is a type of linked list where each node contains data and two…
Given the head of a sorted doubly linked list, remove all duplicate nodes from the list. Each node should appear only once…
Given a sorted doubly linked list and a target sum, find all pairs of nodes whose sum equals the target. Return…
Given a doubly linked list and a key, delete all occurrences of the given key from the doubly linked list. Here’s…
You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order, and each of their nodes…
You are given a linked list that represents a number. Each node contains a single digit, and the digits are stored in…
Given the heads of two singly linked-lists headA and headB, return the node at which the two lists intersect. If the two linked lists…