Problem Bank
Practice with the right problems
Blind 75 for the foundations, NeetCode 150 for the full arc — each tagged by pattern so you can drill one skill at a time.
The classic must-do list. Finish this before anything else.
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problems solved — start anywhere
#ProblemDifficultyPatternStatus
Progress is stored locally in your browser — log in to sync it. Click a problem for study notes, or open a visualizer to study the pattern first.