摘要：
Notes: Edge cases: 1. It does not follow while(it.hasNext()) it.next(). So we need add has next check in next() 2. If index is out of boundary, which 阅读全文
摘要：
class Solution { class Interval { public int start; public int end; public Interval(int x, int y) { start = x; end = y; } } public ... 阅读全文