I was looking for a way to filter practice problems into Solved/Unsolved/All categories.
I came upon this discussion after I asked this question. The extension is for Chrome and I generally use firefox. So I thought to write an add-on for firefox. I joined MDN.
I was thinking what was the way to access solved problems? Is there some kind of codechef API for accessing these or is it purely programming language based?
ANSWER:
No codechef API.
This firefox add-on which uses this script solves my problem.