摘要：
There are N gas stations along a circular route, where the amount of gas at station i is gas[i]. You have a car with an unlimited gas tank and it cost 阅读全文
摘要：
There are N children standing in a line. Each child is assigned a rating value. You are giving candies to these children subjected to the following re 阅读全文
摘要：
Given an input string, reverse the string word by word. For example, Given s = "the sky is blue", return "blue is sky the". Update (2015-02-12): For C 阅读全文