<https://www.codingninjas.com/blog/2021/04/17/how-to-start-with-codechef-competitive-programming/#faq-question-1618638951226>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.codingninjas.com/blog/2021/04/17/how-to-start-with-codechef-competitive-programming/?amp>