止められるAIと一緒にコードを学ぶ

課題を選び、自分で書くか、AIが解答を書くのを見て、引き継ぎたい瞬間に止めてください。すべてブラウザ内で動き、実際のテストで検証されます。

✓ AIが目の前で書く✓ いつでも止めて引き継げる✓ ブラウザ内で実行

Python

CPython 3.12 compiled to WebAssembly. Runs in your browser, not on our servers.

Beginner

Variables, loops, strings, conditionals. One idea per exercise.

12件の課題 · ~83 min

Intermediate

Comprehensions, classes, generators, sorting, recursion.

12件の課題 · ~134 min

Advanced

Dynamic programming, graphs, protocols, caches, rate limiting.

12件の課題 · ~202 min

JavaScript

Runs natively in an isolated worker. Nothing to download.

Beginner

Variables, loops, strings, conditionals. One idea per exercise.

2件の課題 · ~10 min

Intermediate

Comprehensions, classes, generators, sorting, recursion.

2件の課題 · ~20 min

Advanced

Dynamic programming, graphs, protocols, caches, rate limiting.

2件の課題 · ~38 min

SQL

Query a ready-made shop database. SQLite runs in your browser - unlimited and free.

Beginner

Variables, loops, strings, conditionals. One idea per exercise.

3件の課題 · ~18 min

Intermediate

Comprehensions, classes, generators, sorting, recursion.

3件の課題 · ~28 min

Advanced

Dynamic programming, graphs, protocols, caches, rate limiting.

3件の課題 · ~40 min

C

Compiled with gcc in a locked-down sandbox on our server.

Beginner

Variables, loops, strings, conditionals. One idea per exercise.

2件の課題 · ~16 min

Intermediate

Comprehensions, classes, generators, sorting, recursion.

2件の課題 · ~20 min

Advanced

Dynamic programming, graphs, protocols, caches, rate limiting.

2件の課題 · ~26 min

C++

Compiled with g++ (C++17) in a locked-down sandbox on our server.

Beginner

Variables, loops, strings, conditionals. One idea per exercise.

2件の課題 · ~16 min

Intermediate

Comprehensions, classes, generators, sorting, recursion.

2件の課題 · ~22 min

Advanced

Dynamic programming, graphs, protocols, caches, rate limiting.

2件の課題 · ~26 min

Java

Compiled and run on OpenJDK 17 in a locked-down sandbox on our server.

Beginner

Variables, loops, strings, conditionals. One idea per exercise.

2件の課題 · ~15 min

Intermediate

Comprehensions, classes, generators, sorting, recursion.

2件の課題 · ~20 min

Advanced

Dynamic programming, graphs, protocols, caches, rate limiting.

2件の課題 · ~24 min

C#

Compiled with Mono in a locked-down sandbox on our server.

Beginner

Variables, loops, strings, conditionals. One idea per exercise.

2件の課題 · ~15 min

Intermediate

Comprehensions, classes, generators, sorting, recursion.

2件の課題 · ~19 min

Advanced

Dynamic programming, graphs, protocols, caches, rate limiting.

2件の課題 · ~24 min

使い方

1. 課題を読む — 各課題は、境界条件も含めて何を作るかを正確に示します。
2. 自分で書くか、AIに始めさせる — 「AIに書かせる」を押すと、解答が一行ずつエディタに現れます。
3. 好きなときに止める — そこまでのコードは残り、あなたのものになります。書きかけの関数を完成させるほうが、完成品を読むより身につきます。
4. 実行する — コードはこのブラウザで実行され、課題のテストで検証されます。実行のために送信されるものはありません。