← Skills
Recursion & trees
tree DFS
Visit a tree depth-first recursively: handle None, recurse left and right.
Builds on: base case, TreeNode
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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
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