Darbar 009 — Divide Array Into Equal Pairs

Easy

Darbar · Array

Catalog slot 9 of 548 (source id 205). Topic array / bit manipulation.

Solve on LeetCode: Divide Array Into Equal Pairs. 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: 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: bit manipulation / hashing, hash table / bit manipulation.

Evidence (cookiecutter problem_009.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

• Decode Xored Array · easy
• Count The Number Of Consistent Strings · easy
• Sum Of All Subset Xor Totals · easy
• Set Mismatch · easy

Array index · Darbar hub

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