DSA TrainerSpot the AI's bug: Generate all subsets
Meta and Google now hand you an AI assistant in the coding round and score whether you can catch what it got wrong. This Backtracking drill shows you an AI-written solution; your job is to give the verdict, find the flaw, and see the input that breaks it.
The drill
Given an array of distinct numbers, return every possible subset (the power set), including the empty subset.
The AI-assisted round is the newest thing in FAANG hiring, and almost nothing out there trains beginners for it. These drills do, woven right into the guided path.
What you get
- ✓Spot-the-AI's-bug drills interleaved through every pattern unit: verdict, find the flaw, prove it
- ✓The full guided learning path: concept lessons, drills, graded tests, and cold-read capstones
- ✓Stop going blank on algorithm problems. The hint ladder walks you to the answer without spoiling it.
- ✓Know when to reach for each pattern. Every problem names the trigger so you spot it next time.
- ✓Write and run JS or Python in the browser with real test cases on every problem
- ✓Access every new problem, unit, drill, and pattern guide as they ship weekly
“This app finally made it click. I tried NeetCode, CTCI, and YouTube for years and still couldn't solve Two Sum. The beginner mental models for the patterns are genuinely so helpful. THANK YOU.”
Founding Member Deal
$29 / year
or $6 / month
LeetCode Premium is $159/year and doesn't teach you anything.
Less than one Udemy course, with guided problems instead of passive lectures.
One extra month of job searching costs more than a full year here.
Your price is locked in for life.
When the 100th founding spot closes, the price goes up for everyone who joins after. Your rate never changes, no matter how much the curriculum grows.
- ✓Every Spot-the-AI's-bug drill across all units
- ✓All 150 problems across 33 patterns, plus every new one
- ✓New problems, drills, and units weekly
- ✓Cancel anytime
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