Darbar 071 — Divide Array Into Equal Pairs
Easy
Darbar · Bit Manipulation
Catalog slot 71 of 548 (source id 1474). Topic bit manipulation / hashing.
Solve on LeetCode: Divide Array Into Equal Pairs. Do not treat this page as a statement dump.
Aligned T2T band: weeks 7–30. Start at Week 7. 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: array / bit manipulation, hash table / bit manipulation.
Triangulation — Hashing: Darbar speed is Frequency and lookup patterns; Forge depth is Consistent/rendezvous hashing; production artifact is Tenant-aware routing and caches.
Evidence (cookiecutter problem_071.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
- Count The Number Of Consistent Strings · easy
- Longest Nice Substring · easy
- Missing Number · easy
- Find The Difference · easy
Bit Manipulation index · Darbar hub
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