DSAMotivator

Trees & BST

Recursion's home turf: traverse, rebuild, and validate hierarchical data.

The idea

The full written guide for Trees & BSTis 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#226 Invert Binary TreeEasy
  2. 2#104 Maximum Depth of Binary TreeEasy
  3. 3#543 Diameter of Binary TreeEasy
  4. 4#110 Balanced Binary TreeEasy
  5. 5#235 Lowest Common Ancestor of a BSTMedium
  6. 6#102 Binary Tree Level Order TraversalMedium
  7. 7#98 Validate Binary Search TreeMedium
  8. 8#230 Kth Smallest Element in a BSTMedium
  9. 9#105 Construct Binary Tree from Preorder and Inorder TraversalMedium
  10. 10#124 Binary Tree Maximum Path SumHard

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.

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