11
Leetcode alternative for [Hard] problems w/o paywall
(lemmy.world)
CodeWars is way cheaper.
Would Project Euler satisfy your requirements?
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?
Actually, you made me wonder if CodeWars and LeetCode are comparable. I do remember CodeWars having relatively simple problems.
A general programming discussion community.