Learn Algorithms
by Typing
書道 shodō — the way of writing. Calligraphers master strokes by copying the master until the hand remembers. Shodocode teaches algorithms the same way: watch, type, recall — until your fingers know the solution. Think. Ink. Studio.
Three phases. One loop.
Every problem follows the same learning cycle.
Think
Answer guided questions that build intuition before you ever see the solution.
Ink
Watch the solution unfold, type along with it, then rebuild it from memory — support fades rung by rung.
Studio
Weigh the approaches against each other in the Studio — complexity, memory, trade-offs.
Built for retention,
not just completion.
Every feature is tuned to one goal: making patterns stick.
Visual algorithm animations
Arrays, trees, graphs and stacks animate as code executes — no more abstract pseudocode.
Progressive hints
Stuck? Reveal hints one layer at a time, from gentle nudges to full solutions.
Muscle memory through repetition
Ink the same pattern until your fingers know the shape of the algorithm by heart.
Spaced repetition reviews
Problems resurface on a science-backed schedule so what you learn actually sticks.
See how Think feels.
One real warm-up question, straight from the first problem. No signup.
Two Sum: how does a hash map reduce the search from O(n²) to O(n)?
Pick a pattern. Start inking.
Each track groups problems that share a core technique.
Start Learning for Free
No credit card. No paywalls. Just you, the keyboard, and a curated path from beginner to confident.