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LeetCode

Java(117) Linux(1) MongoDB(1) MySQL(2) 计算机安全与网络编程(1)

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全部文章 / LeetCode （共33篇）

207. Course Schedule

There are a total of n courses you have to take, labeled from 0 to n-1. Some courses may have prerequisites, for example to take course 0 you have to...

2019-04-29

0 462

201. Bitwise AND of Numbers Range

待续。。。

2019-04-29

0 446

200. Number of Islands

Given a 2d grid map of '1's (land) and '0's (water), count the number of islands. An island is surrounded by water and is formed by connecting adjacen...

2019-04-28

0 437

188. Best Time to Buy and Sell Stock IV

Say you have an array for which the ith element is the price of a given stock on day i. Design an algorithm to find the maximum profit. You may compl...

LeetCode

2019-04-28

0 2620

180. Consecutive Numbers

Write a SQL query to find all numbers that appear at least three times consecutively. +----+-----+ | Id | Num | +----+-----+ | 1 | 1 | | 2 | 1 ...

2019-04-28

0 491

178. Rank Scores

Write a SQL query to rank scores. If there is a tie between two scores, both should have the same ranking. Note that after a tie, the next ranking num...

2019-04-28

0 585

177. Nth Highest Salary

Write a SQL query to get the nth highest salary from the Employee table. +----+--------+ | Id | Salary | +----+--------+ | 1 | 100 | | 2 | 200 ...

2019-04-28

0 500

176. Second Highest Salary

Write a SQL query to get the second highest salary from the Employee table. +----+--------+ | Id | Salary | +----+--------+ | 1 | 100 | | 2 | 20...

LeetCode SQL

2019-04-28

0 400

175. Combine Two Tables

Table: Person +-------------+---------+ | Column Name | Type | +-------------+---------+ | PersonId | int | | FirstName | varchar | | Las...

2019-04-28

0 453

164. Maximum Gap

待续。。。太难了。。。

LeetCode

2019-04-28

0 357