css tick .tick {position: relative; display: inline-block; width: 40px; height: 40px; border- radius: 20px; background: gray;}.tick:before, .tick:after {background: white; position: absolute; conte
Category: Web
Web front-end development evolved from the production of web pages, and the name has obvious characteristics of the times. In the evolution of the Internet, web page production was a product of the Web1.0 era. At that time, the main content of the website was static, and the behavior of users using the website was mainly browsing. After 2005, the Internet entered the Web 2.0 era, and a large number of Web applications similar to desktop software emerged, and the front end of the website has undergone earth-shaking changes. Web pages are no longer just carrying single text and pictures. Various rich media make the content of web pages more vivid, and the software-based interactive forms on web pages provide users with a better experience. These are all based on front-end technology.
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Question link: https://codeforces.com/contest/1213
A:
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