摘要：
There is a new alien language which uses the latin alphabet. However, the order among letters are unknown to you. You receive a list of non-empty word 阅读全文
摘要：
Given an array of meeting time intervals consisting of start and end times [[s1,e1],[s2,e2],...] (si < ei), find the minimum number of conference room 阅读全文
摘要：
Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it is able to trap after raining. 阅读全文