Yuzhe (Lucas) Li

mistake in comment.

1

https://github.com/ZhangZhenghao/ComputerNetworkingATopDownApproach6E/blob/9871eb5c340db7e4019e85507744371131608b85/Implementing%20a%20Reliable%20Transport%20Protocol/Go-Back-N%20version/prog2.c#L242 When input function is called from below, it should pass data to layer3.Thus this comment should change to "pass data to layer 5" which is above. EDIT: 'it should...

首先，如果大根堆定义为 根是堆中最大的元素，那么如果是找出次数最多的前几项，应该用小根堆。