savageclc26

摘要： 题目：Write a SQL query to find all duplicate emails in a table namedPerson.+----+---------+| Id | Email |+----+---------+| 1 | a@b.com || 2 | c@d.co... 阅读全文

摘要： 题目：TheEmployeetable holds all employees including their managers. Every employee has an Id, and there is also a column for the manager Id.+----+------... 阅读全文

摘要： 题目：给出一个字符串Initial和另一个字符串Detection，判断Detection是否为Initial的一个出栈序列如：Initial =123456，Detection =213654， 则Detection是Initial的一个出栈序列思路一：可以使用栈代码： public sta... 阅读全文

摘要： 题目：反转一个句子，要求句子中的每个单子都被反转，但单词本身不被反转如：I am a Boy! 反转为：Boy! a am I思路：左旋转处理1. 将整个句子的所有字符统一反转2. 根据空格，阶段单词，再反转每一个单词代码： public static String ReversalStrin... 阅读全文

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

摘要： 题目：Write a program to check whether a given number is an ugly number.Ugly numbers are positive numbers whose prime factors only include2, 3, 5. For ex... 阅读全文

摘要： 题目：Clone an undirected graph. Each node in the graph contains alabeland a list of itsneighbors.OJ's undirected graph serialization:Nodes are labeled u... 阅读全文

摘要： 题目：有一个宽为W个小格，高为H个小格，总小格数为W*H的棋盘。棋盘中，可以被涂色的小格用"P"标识，不可以涂色的小格用"B"标识，可以涂色也可以选择不涂色的小格用"?"标识。如下W=5， H=4的棋盘PPPBBPP?BBPP?PPBBP?P有一个儿童，手中有1*1 ， 2*2， 3*3 等方形图章... 阅读全文

摘要： 题目：You are given annxn2D matrix representing an image.Rotate the image by 90 degrees (clockwise).Follow up:Could you do this in-place?思路1：找对应关系，90度翻转是... 阅读全文

摘要： 题目：Given a binary tree, determine if it is height-balanced.For this problem, a height-balanced binary tree is defined as a binary tree in which the de... 阅读全文