9 medium n advanced problem
- https://www.hackerrank.com/domains/algorithms?filters%5Bstatus%5D%5B%5D=solved&filters%5Bskills%5D%5B%5D=Problem%20Solving%20%28Advanced%29&filters%5Bskills%5D%5B%5D=Problem%20Solving%20%28Intermediate%29&badge_type=problem-solving
- more problem like insertion sort n counting sort under basic
- https://www.hackerrank.com/domains/algorithms?filters%5Bstatus%5D%5B%5D=solved&badge_type=problem-solving