MaiDeveloper

Lowest Common Ancestor of a Binary Tree

Lowest Common Ancestor of a Binary Tree

Given a binary tree, find the lowest common ancestor (LCA) of two given nodes in the tree. The lowest common ancestor is defined between two nodes p and q as the lowest node in T that has both p and q as descendants.
Valid Perfect Square

Valid Perfect Square

Given a positive integer num, write a function which returns True if num is a perfect square else False.
String to Integer

String to Integer

The function first discards as many whitespace characters as necessary until the first non-whitespace character is found. Then, starting from this character, takes an optional initial plus or minus sign followed by as many numerical digits as possible, and interprets them as a numerical value.
Merge Two Sorted Lists

Merge Two Sorted Lists

Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lists.
Two sum

Two sum

Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have exactly one solution, and you may not use the same element twice.
Reorganize String

Reorganize String

Given a string str, check if the letters can be rearranged so that two characters that are adjacent to each other are not the same. If possible, output any possible result. If not possible, return the empty string.
How to implement Heap data structure in JavaScript?

How to implement Heap data structure in JavaScript?

A heap is a tree-based data structure which satisfies the heap property, if the parent node is greater than the child node is called max-heap or if the parent node is less than the child node is called min-heap.
Certbot ImportError: ‘pyOpenSSL’ module missing required functionality. Try upgrading to v0.14 or newer.
How to uninstall apps when the uninstall button is gray out on Windows 10?
Smooth scroll on iOS overflow element

Smooth scroll on iOS overflow element

This is a trick to fix/enable smooth scrolling for web pages on iOS.
MasterCutleryRetail.com

MasterCutleryRetail.com

MasterCutleryRetail.com is a E-Commerce website built on Shopify platform. It targets end consumers instead of wholesale businesses (MasterCutlery.com). It help generate revenues and increase brand awareness.
How to install Koken using docker compose?

How to install Koken using docker compose?

Koken is a content management system (CMS) and web site publishing for photographers. Your images are your most important asset. Koken treats them with the attention they deserve by including a full-featured management interface that looks and feels like a desktop application.
How to add code highlight to Ghost blog with Prism?

How to add code highlight to Ghost blog with Prism?

Ghost blog platform doesn't support code highlight. Forunately, there are many solutions out there. One of them is Prism. Prism supports many languages; such as javascript, sql, bash, etc.
How to move logical volume (LVM) to another disk?

How to move logical volume (LVM) to another disk?

Move CentOS 7 logical volume manager (LVM) partition to another disk. And then delete the old LVM partition.
How to shrink logical volume (LVM) using SystemRescueCD?

How to shrink logical volume (LVM) using SystemRescueCD?

Shrinking logical volume (LVM) must go through several steps. Unlike standard partition (ext4 file system). In order to shrink root logical volume, we must boot into a live CD like SystemRescueCD. And then shrink the volume from there.