Darbar 247 — Sort Characters By Frequency

Medium

Darbar · Heap

Catalog slot 247 of 548 (source id 760). Topic heap / counting.

Solve on LeetCode: Sort Characters By Frequency. Do not treat this page as a statement dump.

Aligned T2T band: weeks 31–45. Start at Week 31. 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: heap / hashing, string / sorting.

Triangulation — Heap: Darbar speed is Top-K and scheduler problems; Forge depth is Heap invariants and adversarial streams; production artifact is Streaming Top-K / inference batching.

Evidence (cookiecutter problem_247.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

• Reorganize String · medium
• Top K Frequent Elements · medium
• Top K Frequent Words · medium
• Construct String With Repeat Limit · medium

Heap index · Darbar hub

Darbar slot 247 of Tensor-to-Tenant · Previous · Next.