Darbar 104 — Keys And Rooms

Medium

Darbar · Graphs

Catalog slot 104 of 548 (source id 903). Topic graphs / bfs.

Solve on LeetCode: Keys And Rooms. 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: Timed routing (weeks 1-15, slots 1-120). Warmup: LeetCode-style easy problems (15 min each). Exam: Weekly timed block, 3-5 problems in 60 minutes.

Also filed under: graphs / dfs.

Triangulation — Graphs: Darbar speed is BFS/DFS and shortest paths; Forge depth is SCC, flow, matching, min-cost flow; production artifact is Workflow and routing platform.

Evidence (cookiecutter problem_104.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

• Find If Path Exists In Graph · easy
• All Paths From Source To Target · medium
• Number Of Provinces · medium
• Redundant Connection · medium

Graphs index · Darbar hub

Darbar slot 104 of Tensor-to-Tenant · Previous · Next.