05 2015 档案

Reorder List
摘要：题目：Given a singly linked listL:L0→L1→…→Ln-1→Ln,reorder it to:L0→Ln→L1→Ln-1→L2→Ln-2→…You must do this in-place without altering the nodes' values.For e... 阅读全文
posted @ 2015-05-21 06:39 GoNuts 阅读(139) 评论(0) 推荐(0) 编辑
Repeated DNA Sequences
摘要：题目：All DNA is composed of a series of nucleotides abbreviated as A, C, G, and T, for example: "ACGAATTCCG". When studying DNA, it is sometimes useful ... 阅读全文
posted @ 2015-05-04 07:52 GoNuts 阅读(122) 评论(0) 推荐(0) 编辑
Letter Combinations of a Phone Number
摘要：题目：Given a digit string, return all possible letter combinations that the number could represent.A mapping of digit to letters (just like on the telep... 阅读全文
posted @ 2015-05-04 01:35 GoNuts 阅读(122) 评论(0) 推荐(0) 编辑
Anagrams
摘要：题目：Given an array of strings, return all groups of strings that are anagrams.Note: All inputs will be in lower-case.思路：面试过更简单的形式，判断两个string是否是anagram。... 阅读全文
posted @ 2015-05-04 00:52 GoNuts 阅读(157) 评论(0) 推荐(0) 编辑
Surrounded Regions
摘要：题目：Given a 2D board containing'X'and'O', capture all regions surrounded by'X'.A region is captured by flipping all'O's into'X's in that surrounded reg... 阅读全文
posted @ 2015-05-03 01:36 GoNuts 阅读(162) 评论(0) 推荐(0) 编辑
Happy Number
摘要：题目：Write an algorithm to determine if a number is "happy".A happy number is a number defined by the following process: Starting with any positive inte... 阅读全文
posted @ 2015-05-01 05:38 GoNuts 阅读(126) 评论(0) 推荐(0) 编辑
N-Queens
摘要：题目：Then-queens puzzle is the problem of placingnqueens on ann×nchessboard such that no two queens attack each other.Given an integern, return all dist... 阅读全文
posted @ 2015-05-01 05:03 GoNuts 阅读(125) 评论(0) 推荐(0) 编辑