← Skills
BFS & grids
visited set
Track visited cells/nodes in a set to avoid revisiting.
Builds on: set.add, set membership
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Unseen
No reps yet
No reps yet.
- Attempts
- 0
- Correct
- 0
- Failed
- 0
- Clean streak
- 0
- Cold
- 0/0
- Hints
- 0
Next review: after your first rep
Recent attempts
No reps yet.