aalan

摘要： Given an integer n, return true if it is a power of two. Otherwise, return false. An integer n is a power of two, if there exists an integer x such th 阅读全文

摘要： 起因：之前租了一个腾讯云服务器，每次登录的时候都会弹出一个warning，提示有很多failed login，也就是有很多主机尝试登录你的服务器。 1、查看有哪些主机尝试过登录你的服务器： [root@VM-4-12-centos ~]# lastb | head cirros ssh:notty 阅读全文

摘要： Given an encoded string, return its decoded string. The encoding rule is: k[encoded_string], where the encoded_string inside the square brackets is be 阅读全文

摘要： Given an m x n binary matrix filled with 0's and 1's, find the largest square containing only 1's and return its area. Example 1: Input: matrix = [["1 阅读全文

摘要： Given the head of a singly linked list, sort the list using insertion sort, and return the sorted list's head. The steps of the insertion sort algorit 阅读全文

摘要： Given the root node of a binary search tree and two integers low and high, return the sum of values of all nodes with a value in the inclusive range [ 阅读全文

摘要： The power of the string is the maximum length of a non-empty substring that contains only one unique character. Given a string s, return the power of  阅读全文

摘要： A positive integer is magical if it is divisible by either a or b. Given the three integers n, a, and b, return the nth magical number. Since the answ 阅读全文

摘要： Given an array of non-negative integers arr, you are initially positioned at start index of the array. When you are at index i, you can jump to i + ar 阅读全文

摘要： 1、什么是Embarrassingly Parallel（易并行计算问题） 易并行计算问题：A computation that can be divided into a number of completely independent tasks。在编写并行程序过程中，首先需要将一个问题分解成若 阅读全文