Demonstrate all the questions on LeetCode in the form of animation.（用动画的形式呈现解LeetCode题目的思路）

Apollo is a reliable configuration management system suitable for microservice configuration management scenarios.

The automation tower defense RTS

SketchBoard是一个可涂鸦、绘图、添加文字、图像（可旋转缩放）、背景的Fragment，其中主要由SketchView利用matrix完成所有图形绘制操作。 SketchBoard is a Fragment that can add a graffiti, graphics, text, images (rotating and scaling), or background 。