第503天 教娃编程 - 判断平面上四个顶点是否可以组成正方形(笛卡尔坐标系, 数学, 哈希表)

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Post: Day 503 - Teaching Kids Programming - Valid Square Algorithm by Four Points in Cartesian Coordinate System (Math, Hashmap)

• B 站: https://www.bilibili.com/video/BV1bt4y1V7WG/

• 西瓜: https://www.ixigua.com/7125752861589406245

• 目录: https://zhihua-lai.com/teaching/ch/

• List of Videos: https://zhihua-lai.com/teaching/

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