Darbar 030 — Running Sum Of 1D Array

Easy

Darbar · Array

Catalog slot 30 of 548 (source id 151). Topic array / prefix-sum.

Solve on LeetCode: Running Sum Of 1D Array. 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.

Evidence (cookiecutter problem_030.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 The Highest Altitude · easy
• Find Pivot Index · easy
• Maximum Xor For Each Query · medium
• Matrix Block Sum · medium

Array index · Darbar hub

Darbar slot 30 of Tensor-to-Tenant · Previous · Next.