Darbar 515 — Binary Tree Cameras

Hard

Darbar · Trees

Catalog slot 515 of 548 (source id 603). Topic trees / dp based.

Solve on LeetCode: Binary Tree Cameras. Do not treat this page as a statement dump.

Aligned T2T band: weeks 46–57. Start at Week 46. Full map: Darbar hub.

Pattern block: Mock and personal gauntlet (weeks 91-108, slots 471-548). Warmup: Two-problem blocks (45 min). Exam: Full mock interviews scored on a rubric.

Triangulation — Trees: Darbar speed is Traversal, LCA, tree DP; Forge depth is Euler Tour, HLD, DSU on Tree; production artifact is Agent-execution forensics.

Evidence (cookiecutter problem_515.md)

1. Attempt log (approaches that failed)
2. Final complexity (time and space)
3. One mistake corrected
4. Production concept this slot reinforces

Personal dates and the CSV tracker stay in the learner journal.

Same subtopic

• Count Subtrees With Max Distance Between Cities · hard
• Sum Of Distances In Tree · hard
• Maximum Sum Bst In Binary Tree · hard
• Binary Tree Maximum Path Sum · hard

Trees index · Darbar hub

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