superid | Activity Streams

@peking2 你老的代码是天书阿。也没注释。

看我的recursive 解法，用你的test case 结果一样。代码多不少，大部分是Boilerplate code
但是原理简单很容易理解。

I guess the question should be ”max water it can hold ”. the same question as histogram

leetcode, please consider integrate your backend with some process monitoring library, so it will be more reliable.

java error for me too