The system
Remember patterns, not solutions
Write the pattern trigger for each problem. Practice recall on a schedule. Watch your retention grow as the loop keeps everything fresh until interview day.
KeepSolved
Solve it once. Still know it on interview day.
Capture the pattern trigger. Get graded Recall drills on an FSRS schedule — before the blank page returns.
Signature visual
Trajectory
ratingmastery
How it works
From one problem to long-term memory
Step 01
Add a problem
Recall Engine
Graded drills, not bookmarks
Favorites don't schedule re-solves. Three modes pressure-test recognition so the pattern still fires when the prompt is new.
Live drill · Recall
Sorted array. Need a pair that sums to target.
Thinking…
AgainHardGoodEasy
One problem. The whole loop.
Feel retention before you commit an account
Load a problem, write the trigger, save when it clicks. Platforms and public cards stay optional.