DSA TrainerPremiumLinked ListsEasy
Drill #37 — Pattern ID
Read a real-world scenario and name the algorithm pattern — no labels, no hints, no LeetCode titles. This drill builds the recognition skill that transfers to every new problem you haven't seen before.
What you unlock
- ✓All 52 pattern ID drills — real-world scenarios, no pattern labels
- ✓After each guess, unlock 4 pattern signals: the exact cues that identify the technique
- ✓Full guided problem set: 8-step walkthroughs, hint ladders, and a JS + Python code runner
- ✓Founding member feature request form — help shape the roadmap
- ✓New drills and problems added every week
- ✓Cancel anytime
Patterns covered
Hash MapSetFrequency MapTwo PointersSliding WindowStackBinary SearchLinked ListKadane's AlgorithmTree TraversalTracking MinimumGraph TraversalDynamic Programming
Already done the free drills? The premium ones cover graph traversal, dynamic programming, and backtracking — the patterns that show up most in phone screens and that most self-taught devs have never practiced.
12 of 100 founding member spots left
Founding Member Deal
$29 / year
or $6 / month
Lock in founding member pricing.
New drills and problems ship every week. Founding members get a feature request form and direct access to the roadmap.
- ✓All 52 pattern ID drills
- ✓Full guided problem set
- ✓Feature request form
- ✓Cancel anytime
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