摘要： Description: You are climbing a stair case. It takes n steps to reach to the top. Each time you can either climb 1 or 2 steps. In how many distinct wa 阅读全文

摘要： Refer https://leetcode.com/problems/sum-of-two-integers/discuss/84278/A-summary:-how-to-use-bit-manipulation-to-solve-problems-easily-and-efficiently 阅读全文

摘要： 二叉树 easy 108. Convert Sorted Array to Binary Search Tree 2. 二叉树 617. Merge Two Binary Trees 104. Maximum Depth of Binary Tree 列表题： 21. Merge Two Sorte 阅读全文

摘要： 1. Non recursive solution. 2. Recursive solution 阅读全文

摘要： 问题描述： Given a non-empty array of integers, return the k most frequent elements. For example, Given [1,1,1,2,2,3] and k = 2, return [1,2]. For example, 阅读全文

摘要： --未完，待续 阅读全文

摘要： --未完，待续 阅读全文

摘要： Error description: tar xvf hadoop-3.0.0-src.tar.gz gzip: stdin: not in gzip formattar: Child returned status 1tar: Error is not recoverable: exiting n 阅读全文

摘要： Context: wrote a script to get all ips for product but always get this error. as below: ./getAllIps.sh: line 21: warning: here-document at line 18 del 阅读全文

摘要： a) Download artificts from: http://www.oracle.com/technetwork/middleware/weblogic/downloads/wls-main-097127.html As we need to uses JRF, the better ch 阅读全文