AtCoder Workspace

Transform your AtCoder problem pages into an all-in-one browser-based IDE where you can write, test, submit, and track your learning progress on the fly! No environment setup, no copying and pasting sample cases, and no switching between tabs. From the moment you open a problem page, you can code, run sample & custom tests, submit, and take study notes in one unified screen. -------------------------------------------------- 🚀 What's New in Version 1.8.0 -------------------------------------------------- ★ 1. Custom Test Cases Support - Add, edit, and save your own custom test cases (standard input and optional expected output) per problem and run them together with official sample cases in one click. ★ 2. Learning Dashboard, Study Notes & Error Trend Analysis - Record "Self AC" vs. "Editorial AC", attach algorithm and mistake tags, and write review notes right in the console. - Visualize your Self AC ratio, top mistake patterns, and contest-by-contest progress in the new Learning Dashboard tab. ★ 3. Expanded Support for 32 Programming Languages - Full template, custom snippet, Monaco syntax highlighting, and past submission auto-fetch support across 32 programming languages available on AtCoder. ★ 4. Safe Reload & Code Backup Protection - Automatically backs up unsaved code to local storage if the extension updates in the background, restoring your work seamlessly upon reload. -------------------------------------------------- 💎 Key Features -------------------------------------------------- 1. Supercharge Your Daily Practice ("Shojin") - [Auto-Save] Automatically saves your code locally after 1.5 seconds of inactivity or when switching tabs. - [Quick Navigation] Jump straight to Prev / Next problems without returning to the contest index. - [AC Tracking & Notes] Track Self AC and Editorial AC status, tags, and study memos for structured review. 2. One-Click Local Testing (Samples + Custom Cases) - Automatically scrapes sample inputs and expected outputs from the problem statement. - Click "Test Run" to execute all cases and check verdicts instantly with visual diffs and standard error output. 3. Split-View Monaco Editor Embedded in the Problem Page - Powered by Monaco Editor (the engine behind VS Code) with resizable split panes and terminal panel. - Automatically adapts to AtCoder's light and dark themes. 4. Language-Specific Templates & Custom Snippets - Auto-insert starter templates for each language and register reusable algorithm snippets for instant autocompletion. -------------------------------------------------- ☘️ How to Use (Ready right after installation) -------------------------------------------------- 1. Install this extension. 2. Open any AtCoder problem page (e.g., https://atcoder.jp/contests/abs/tasks/practice_1 ). 3. The editor appears on the right side. Write your code, click "Test Run" to verify, and click "Submit"! -------------------------------------------------- 🛡️ Privacy & Security -------------------------------------------------- - Your personal information and source code are never sent to external servers. - All code and learning data are stored strictly locally in your browser (chrome.storage.local).