I used to forget the approaches of solved CP problems on leetcode,
and that's when I realised, Revision is more important than solving a problem....
But what's more difficult than that realisation was to follow it everyday.
Solving a medium level problem takes abt an hour, and then manually taking note of learning outcomes was really hard for me.
So I built a system (Extension + Website) that automatically tracks submissions, schedules solved problems based on the approach and attempts taken (eg: 3rd day, 5th day, etc) and provides recap of mistakes done across various attempts, recommend approach to solve that problem.
The extension is Opensource and public now:
Try it out: 
Website: leetvision.in
It is open for contributions, this is a community build....
So, I'm really eager to hear from you people
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