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The C3.ai screen pair: Trapping Rain Water and Daily Temperatures

C3.ai runs the most LeetCode-classic FDE loop, and candidates report the same published set for years: Trapping Rain Water on the phone screen, Daily Temperatures in the tech screen. Both optimal solutions, plus the one-line insight that unlocks each.

Updated Sep 2026 · Grounded in real Forward Deployed Engineer interview loops and written to a senior-engineer editorial bar.

C3.ai runs the most LeetCode-classic FDE loop, and candidates report the same published set for years: Trapping Rain Water on the phone screen, Daily Temperatures in the tech screen. Both optimal solutions, plus the one-line insight that unlocks each.

20 answers per topic instead of 10, plus saved progress and bookmarks · no cardor unlock all 523 remaining answers · ₹2,000 / $25
UP NEXT ON YOUR JOURNEY
Next in this trackBuild a rules engine: evaluate boolean expressions like `age > 18 and country in ["US","CA"]` over a recordNext in this trackBuild a circuit breaker: closed/open/half-open with a failure window, cooldown, and a single half-open probeNext in this trackBuild a streaming deduplicator: drop duplicate events within a sliding time window, bounded memory, late events
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