The guided Rust interview lab

Think clearly.
Code fearlessly in Rust.

Master the 150 interview patterns through real execution, progressive hints, and explanations that connect the algorithm to idiomatic Rust.

Explore the roadmap ↓

150 guided lessons450 layered hintsReal Rust execution

LIVE RUST WORKSPACE

FEATURED LESSON

Two Sum

Easy

Arrays & Hashing→Guided Rust→Mastery

solution.rsRUST

1 pub fn solve(input: &[i32]) -> Answer 
2 {
3   // name the invariant
4   todo!()
5 }
6

Lesson 3 of 9Guided Rust path

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Why this lesson Build a strong Rust problem-solving foundation with guided reasoning.

03progressive hints✓private testsO(n)analysis

0%complete

YOUR ROADMAP

0 of 150 solved

A little Rust, every day.

✓0Problems solved

⌁0Patterns learned

✦0Experience points

↗0Day streak

ADAPTIVE PRACTICE

Today's learning plan

0reviews due

The Crabcode 150

Your path from arrays
to advanced graphs.

Based on the NeetCode 150, rebuilt as a guided Rust curriculum. Choose a pattern, then work through its problems in order.

SolvedIn progressUp next

Pattern mapFollow the branches from foundations to advanced techniques.SELECTEDArrays & Hashing

WHY RUST?

Learn the algorithm.
Understand the machine.

Crabcode turns Rust’s strictness into a teaching tool. Every lesson calls out the ownership, borrowing, and type decisions that make your solution safe and fast.

Pattern before syntax

Visual reasoning and plain-English invariants come before the editor.

LEARN

Hints, not spoilers

Three progressive nudges preserve the breakthrough while keeping you moving.

THINK

Idiomatic Rust

Every solution explains ownership choices, correctness, and complexity.

REVIEW

Execution with feedback

Run real Rust, add your own tests, and turn failures into targeted coaching.

BUILD