Darbar 439 — Add Binary

Easy

Darbar · String

Catalog slot 439 of 548 (source id 379). Topic string / bit manipulation.

Solve on LeetCode: Add Binary. 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.

Evidence (cookiecutter problem_439.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 The Number Of Consistent Strings · easy
• Longest Nice Substring · easy
• Find The Difference · easy
• Letter Case Permutation · medium

String index · Darbar hub

Darbar slot 439 of Tensor-to-Tenant · Previous · Next.