I've tried Euler years ago, it's got great problems, but not very easy to test your solutions.
I registered on Codewars now and attempted a few Katas. The portal is pretty barebones and that sits fine with me!
However I don't see the same caliber of problems at higher difficulties that leetcode offer. The problems are also lacking (Trees are not a tag!) - for instance Dynamic programming only has 3 problems across the site.
Am I missing something? Will I unlock all the problems after upgrading to Red?