Added new coding practice website for beginners

Author: cultwizard

README.md

@@ -137,6 +137,8 @@ When learning CS, there are some useful sites you must know to get always inform
 - [Oh Shit, Git!?!](https://ohshitgit.com/) : Cheat sheet to get yourself out of bad git situations
 - [The Odin Project](https://www.theodinproject.com/home) : The Odin Project provides a free open source coding curriculum that can be taken entirely online.
 - [Udemy](https://www.udemy.com/) : Whether you want to learn or to share what you know, you’ve come to the right place. As a global destination for online learning, we connect people through knowledge.
+- [USACO Guide](https://usaco.guide/): A free collection of curated, high-quality resources
+to take you from Bronze to Platinum and beyond.
 - [Scaler](https://www.scaler.com/topics/) : A curated interactive space for aspiring programmers to learn and master their coding skills. Also help in job interview.
 - [SQL Zoo](https://sqlzoo.net/wiki/SQL_Tutorial) : Learn SQL interactively in stages, from basic queries to complex operations.
 - [SQLTest.online](https://sqltest.online) : Boost Your SQL Proficiency with Challenging Problems.