An interactive web app that teaches dynamic programming visually. Watch recursion trees build up, see where the wasted work is, then flip on memoization and watch it collapse.

Each problem walks you through the same progression:

1. See brute force — step through a recursion tree and spot the duplicate calls (red nodes)
2. Turn on memoization — watch branches get pruned and a memo table fill up in real time
3. Learn the vocabulary — concepts like "overlapping subproblems" appear after you've already seen what they mean
4. Write the code — solve it yourself in JS or Python with instant test feedback

• Fibonacci Numbers
• Climbing Stairs
• Grid Paths
• Coin Change
• 0/1 Knapsack

Requires Bun:

bun install
bun dev

Then open http://localhost:5173.

• React + TypeScript
• Tailwind CSS v4
• Vite
• CodeMirror (code editor)
• Pyodide (Python execution in browser, loaded on demand)

src/
  components/     UI components (TreeLesson, RecursionTree, CodePanel, etc.)
  problems/       Tree builders for each DP problem
  problems/configs/  Problem configs (code, test cases, concept text)
  engine/         Code execution (Web Worker for JS, Pyodide for Python)