DSA TrainerCold pattern recognition. No hints, no labels.
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.
A fitness tracking app counts the number of distinct step patterns a user can take to reach the top of a staircase.
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.
What you get
- ✓The full DSA course: concept lessons, drills, graded tests, and cold-read capstones for every pattern
- ✓The full System Design course for the design round, included at no extra cost
- ✓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
- ✓New drills, units, and problems added every week
“This app finally made it click. I tried NeetCode, CTCI, and YouTube for years and still could not solve Two Sum. The beginner mental models for the patterns are genuinely so helpful. THANK YOU.”
Full access
$49.99 / year
or $9.99 / month
Now includes a C++ runner alongside JavaScript and Python.
LeetCode Premium is $159/year and doesn't teach you anything.
Less than one Udemy course, with guided problems instead of passive lectures.
- ✓Both courses: DSA + System Design
- ✓All 52 pattern ID drills
- ✓Full guided problem set
- ✓Cancel anytime
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New to this pattern? Learn Dynamic Programming free first →