Two-dimensional (2D) shapes are completely flat. 2D shapes can be found printed in a book or on a website. 2D shapes have sides and corners. A rectangle has 4 straight sides and 4 corners. A square is ...

Leetcode刷题之旅. Contribute to qicst23/Leetcode-Java-3 development by creating an account on GitHub.

Relive the era of BBM pins and Mxit chat rooms. A nostalgic look at the iconic mobile phones and tactile keyboards that defined a generation. The post BBM & Mxit: The Devices That Defined Mobile ...