I only have basic knowledge about algorithms and data structure at the time I am tring to pass PTA advanced level. I will leave as much note as I can to help noobs just like me able to get the point. Keep it sample and stupid,no tricks. 关于数据结构和算法我只有基础的一些知识 我会留下尽可能多的注释来帮助理解 保持代码的简单好清晰