摘要:
Given a list, rotate the list to the right bykplaces, wherekis non-negative.For example:Given1->2->3->4->5->NULLandk=2,return4->5->1->2->3->NULL.使用两个指... 阅读全文
摘要:
Divide two integers without using multiplication, division and mod operator.If it is overflow, return MAX_INT. 1 public class Solution { 2 public ... 阅读全文
摘要:
Determine if a Sudoku is valid, according to:Sudoku Puzzles - The Rules.The Sudoku board could be partially filled, where empty cells are filled with ... 阅读全文
摘要:
Given a sorted linked list, delete all nodes that have duplicate numbers, leaving onlydistinctnumbers from the original list.For example,Given1->2->3-... 阅读全文
摘要:
Follow up for "Remove Duplicates":What if duplicates are allowed at mosttwice?For example,Given sorted array A =[1,1,1,2,2,3],Your function should ret... 阅读全文
摘要:
Given a collection of candidate numbers (C) and a target number (T), find all unique combinations inCwhere the candidate numbers sums toT.Each number ... 阅读全文
摘要:
线程安全性1.什么是线程安全 在线程安全的定义中,最核心的概念是正确性。正确性的含义是,某个类的行为与规范完全一致。当对正确性有了一个比较清晰的定义后,就可以定义线程安全性:当多个线程访问某个类时,这个类始终能表现出正确的行为,那这个类就是线程安全的。 举例:无状态对象一定是线程安全的。 ... 阅读全文
摘要:
Given a string containing just the characters'('and')', find the length of the longest valid (well-formed) parentheses substring.For"(()", the longest... 阅读全文
摘要:
Implement an iterator over a binary search tree (BST). Your iterator will be initialized with the root node of a BST.Callingnext()will return the next... 阅读全文
摘要:
自己在虚拟机上建立伪分布环境,第一天还一切正常,后来发现每次重新开机以后都不能正常启动,在start-dfs.sh之后jps一下发现namenode不能正常启动,按提示找到logs目录下namenode的启动log发现如下异常。hadoop@cgy-VirtualBox:~$ jps5096 Re... 阅读全文