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0x00 选择器介绍 选择器：查找页面元素的一种方式方法 ：规定了选择器查找到的元素(标签)实现统一的样式规定 样式规则里面放置的是属性和属性值 需要注意的是：属性和属性值需要使用冒号：连接 每一组属性和属性值结束后需要使用分号结尾 如果是最后一组，则不用写分号 示例： <!DOCTYPE html 阅读全文
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00 笔记-网站的组成三个内容 Html结构 - 了解清楚 Css样式 - 对结构的修饰 js的行为交互 - 一系列的动态的效果 <!DOCTYPE html> <html> <head> <meta charset="utf-8" /> <title></title> </head> <body> 阅读全文
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宝宝点击下面的链接喔 (最好带着耳机) 点我点我！ 阅读全文
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题目 In this term, Alice took nn courses. Now, she has finished all final exams, and she will get her grades in the following nn days. On the i-th day, 阅读全文
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题目 a 题意 给出n个不同的数，如果这n个数有四个异或起来等于0，就是YES，如果一组都没有就是NO。 思路 考虑 a ^ b = c , 每次把两两异或后的值记录为1，如果有一个数记录了2次，即有两组数异或起来相等，由于这n个数都是不同的数，所以不可能存在ab=c && ad=c 的情况，所以必 阅读全文
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2020 is a special integer, it's formed of two same integers (20 and 20). We call a number is a good number, if and only if it can be formed of two sam 阅读全文
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题目 As a world-famous traveler, Prof. Pang's research interest is to travel as many places as possible in his life. We have a segment {[0, n]}[0,n]. Th 阅读全文
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题目 Your git project (you don't need to be familiar with git to solve this problem) has some files that should be ignored from synchronizing. You need 阅读全文
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题目 A mine-sweeper map X can be expressed as an n\times mn×m grid. Each cell of the grid is either a mine cell or a non-mine cell. A mine cell has no n 阅读全文
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题目 In mathematics, the Fibonacci numbers, commonly denoted as f_nf n , is a sequence such that each number is the sum of the two preceding numbers, 阅读全文