Blind 75 · Curated sheets · Local first

Practice DSA,
one canonical workspace at a time.

Jump from curated sheets into a real coding layout with problem-specific starter templates, local drafts, and progress tracking in your browser.

Browse Lists

Why Ratta?

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Curated Sheets

Blind 75 today, more structured sheets next. Use lists for discovery without fragmenting the actual problem workspace.

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Problem Templates

Every problem opens with language-specific starter code in C++, Java, Python, and Go.

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Local Workspace

Drafts, language preferences, progress, and pane state stay local. No account needed.

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Canonical Problem Pages

Each problem has one stable URL, even when it appears in multiple lists.