BYRHuangQiang

摘要： 1.普通锁 只有lock功能， Java实现：ReentrantLock lock = new ReentrantLock(); lock和unlock： 2.读写锁 读写锁：分为读锁和写锁，多个读锁不互斥，读锁与写锁互斥。 总之，读的时候上读锁，写的时候上写锁！ Java里面的实现：Reentra 阅读全文

摘要： leetcode面试准备: Maximal Rectangle === 1 题目 Given a 2D binary matrix filled with 0's and 1's, find the largest rectangle containing all ones and return... 阅读全文

摘要： leetcode面试准备: Game of Life === 1 题目 According to the Wikipedia's article: "The Game of Life, also known simply as Life, is a cellular automaton devi... 阅读全文

摘要： leetcode面试准备: Word Pattern === 1 题目 Given a pattern and a string str, find if str follows the same pattern. Examples: Notes: patterncontains onl... 阅读全文

摘要： leetcode面试准备:Add and Search Word Data structure design === 1 题目 Design a data structure that supports the following two operations: search(word) c... 阅读全文

摘要： leetcode面试准备:Reverse Words in a String === 1 题目 Given an input string, reverse the string word by word. For example, Given s = "the sky is blue", ... 阅读全文

摘要： leetcode面试准备:Implement Trie (Prefix Tree) === 1 题目 Implement a trie with , , and methods. Note: You may assume that all inputs are consist of lowerc... 阅读全文

摘要： leetcode面试准备:Triangle === 1 题目 Given a triangle, find the minimum path sum from top to bottom. Each step you may move to adjacent numbers on the row... 阅读全文

摘要： leetcode面试准备:Sliding Window Maximum === 1 题目 Given an array nums, there is a sliding window of size k which is moving from the very left of the array... 阅读全文

摘要： leetcode面试准备:Simplify Path === 1 题目 Given an absolute path for a file (Unix style), simplify it. For example, path = "/home/", = "/home" path = "/a... 阅读全文