Darbar 222 — Number Of Substrings Containing All Three Characters
Medium
Darbar · Hash Table
Catalog slot 222 of 548 (source id 701). Topic hash table / sliding window.
Solve on LeetCode: Number Of Substrings Containing All Three Characters. 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: Tree and graph fluency (weeks 31-45, slots 201-280). Warmup: Tree traversals and adjacency-list graph walks. Exam: Tree+graph block with one design flavored problem.
Also filed under: string / sliding window.
Evidence (cookiecutter problem_222.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
- Substrings Of Size Three With Distinct Characters · easy
- Contains Duplicate Ii · easy
- Sliding Window Median · hard
- Minimum Window Substring · hard
Darbar slot 222 of Tensor-to-Tenant · Previous · Next.