DSAMotivator

Stack & Monotonic Stack

Last-in-first-out order solves matching, parsing, and 'next greater' in one sweep.

The idea

The full written guide for Stack & Monotonic Stackis on its way. The practice progression below is live — it's the same curated, ordered list our users work through inside the app.

Practice progression

In this order, on LeetCode. Each one adds a wrinkle the previous one didn't have.

  1. 1#20 Valid ParenthesesEasy
  2. 2#155 Min StackMedium
  3. 3#150 Evaluate Reverse Polish NotationMedium
  4. 4#739 Daily TemperaturesMedium
  5. 5#853 Car FleetMedium
  6. 6#84 Largest Rectangle in HistogramHard
  7. 7#735 Asteroid CollisionMedium

Knowing the pattern is half the job. Showing up daily is the other half.

DSAMotivator tracks this exact progression — with streaks, XP, and a map that fills in as you go.

Start free — 7 days