摘要：
Problem: Given a two-dimensional graph with points on it, find a line which passes the most number of points.此题是Cracking the code 5th edition 第七章第六题，思... 阅读全文
摘要：
The tricky thing is how to decide the key for a hashmap. Especially when you intend to use self-defined objects as key.If you want to make two differe... 阅读全文