Given a binary matrix A, we want to flip the image horizontally, then invert it, and return the resulting image.

Given an integer n, return any array containing n unique integers such that they add up to 0.

Given a positive integer num consisting only of digits 6 and 9.

Given an integer number n, return the difference between the product of its digits and the sum of its digits.

本来以为是 事件冒泡的原因,但是阻止了事件的冒泡还是一直闪动,后来发现其实是应为i标签和input标签的层级原因应为是平级所以鼠标悬浮到i上会认为是离开了...

Vue.js中最让引人入胜的功能之一就是: 数据的双向绑定,下面使用原生JavaScript, 只须区区20行代码即可实现:

A peak element is an element that is greater than its neighbors.

现在有n个人，从1标号到n。同时有一些奇怪的约束条件，每个都形如：a必须在b之前。同时，社会是不平等的，这些人有的穷有的富。1号最富，2号第二富，以此类推。有钱人就贿赂负责人，所以他们有一些好处。...

In the modern time, Search engine came into the life of everybody like Google, Baidu, etc.Wiskey also wants to bring this feature to his image retrieval system...

Convert a non-negative integer to its english words representation. Given input is guaranteed to be less than 2^31 - 1.