摘要: QuestionGiven a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.For example,"A man, a plan, a can... 阅读全文
posted @ 2015-09-17 08:05 树獭君 阅读(169) 评论(0) 推荐(0)
摘要: QuestionGivennnon-negative integersa1,a2, ...,an, where each represents a point at coordinate (i,ai).nvertical lines are drawn such that the two endpo... 阅读全文
posted @ 2015-09-17 03:46 树獭君 阅读(138) 评论(0) 推荐(0)