121. Best Time to Buy and Sell Stock
You are given an array prices where prices[i] is the price of a given stock on the i^th day.
You want to maximize your profit by choosing a single day to buy one stock and choosing a different day in the future to sell that stock.
118. Pascal's Triangle II
Given an integer rowIndex, return the rowIndex^th row of the Pascal's triangle. Notice that the row index starts from 0. 
In Pascal's triangle, each number is the sum of the two numbers directly above it.
118. Pascal's Triangle
Given a non-negative integer numRows, generate the first numRows of Pascal's triangle.
In Pascal's triangle, each number is the sum of the two numbers directly above it.
112. Path Sum
Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the given sum.
Note: A leaf is a node with no children.
111. Minimum Depth of Binary Tree
Given a binary tree, find its minimum depth.
The minimum depth is the number of nodes along the shortest path from the root node down to the nearest leaf node.
Note: A leaf is a node with no children.
110. Balanced Binary Tree
Given a binary tree, determine if it is height-balanced.
For this problem, a height-balanced binary tree is defined as:
a binary tree in which the left and right subtrees of
How to add recent posts to Next theme（v8.x.x）
If you have managed your blog for a long time, maybe you want to reach high impression, you can append Recent Post to sidebar. Viewers can see it whatever the article they read.
108. Convert Sorted Array to Binary Search Tree
Given an array where elements are sorted in ascending order, convert it to a height balanced BST.
For this problem, a height-balanced binary tree is defined as a binary tree in which the depth of the two subtrees of every node never differ by more than 1.
Bootcamp: File sharing between Mac OS X and Windows 10 on MacBook Pro
Here are some reason you should consider deploying Windows on your Mac device. 1. More games with better performance in Windows OS. 2. Some Applications don't work in macOS or not support all functions. 3. Developers need to test projects in Windows OS.
So, I shared my experience to save your time of installing Windows on MacBook Pro.
Tutorial - Install Ryu in Ubuntu 16.04 with no failure
Ryu is a component-based software defined networking framework. It's very easy to develop your own SDN controller. And, if you have any questions, there are rich source on the internet.