Installing Homebrew without root permissions

All the Mac owners out there at some point or other know the importance of having…

Single Element in a Sorted Array

Given a sorted array consisting of only integers where every element appears twice except for one…

Leetcode: Add Two Numbers

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 contain a single digit. Add the two numbers and return it as a linked list.

Why and How to Override equals and hashCode methods in java

Find the parent of a node in Binary Tree

Given a Binary Tree and value X, find X in the tree and return its parent.

Return List of Reverse Levels of Binary Tree

Given a binary tree, return the bottom-up level order traversal of its nodes’…

Stack Implementation using Linked List

I was trying to implement a stack. As we all know that a stack is a Last In First Out (LIFO)…

Sorted Two Sum

Given an array of sorted integers, find two numbers such that they add up to a specific target number.

LRU Cache Implementation

This is a sample LRU cache implementation in Python.

Binary Search Tree Implementation

Here is a simple Binary Search Tree implementation in Java.