I used to do algo practice. I still do, but I used to, too.
-
Starter level: https://trello.com/b/smxNsfu6/algorithm-ladder
-
Easy Level: https://leetcode.com/explore/interview/card/top-interview-questions-easy/
-
Medium Level: https://leetcode.com/explore/interview/card/top-interview-questions-medium/
-
Hard Level: https://leetcode.com/explore/interview/card/top-interview-questions-hard/
-
Helpful list sorted by algo types: https://seanprashad.com/leetcode-patterns/
-
Leetcode created study list: https://leetcode.com/study-plan/