Darbar 429 — Trapping Rain Water
Hard
Darbar · Stack
Catalog slot 429 of 548 (source id 111). Topic stack / two pointer.
Solve on LeetCode: Trapping Rain Water. Do not treat this page as a statement dump.
Aligned T2T band: weeks 1–6. Start at Week 1. Full map: Darbar hub.
Pattern block: Advanced and interview fusion (weeks 61-90, slots 361-470). Warmup: Classic DP and greedy patterns. Exam: Mixed 4-problem block mirroring a real interview.
Also filed under: stack / dp based.
Evidence (cookiecutter problem_429.md)
- Attempt log (approaches that failed)
- Final complexity (time and space)
- One mistake corrected
- Production concept this slot reinforces
Personal dates and the CSV tracker stay in the learner journal.
Same subtopic
- Maximum Twin Sum Of A Linked List · medium
- Minimum Number Of Swaps To Make The String Balanced · medium
- Maximum Score Of A Good Subarray · hard
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