Search

# As a condition of accessing this website, you agree to abide by the following
# content signals:

# (a)  If a Content-Signal = yes, you may collect content for the corresponding
#      use.
# (b)  If a Content-Signal = no, you may not collect content for the
#      corresponding use.
# (c)  If the website operator does not include a Content-Signal for a
#      corresponding use, the website operator neither grants nor restricts
#      permission via Content-Signal with respect to the corresponding use.

# The content signals and their meanings are:

# search:   building a search index and providing search results (e.g., returning
#           hyperlinks and short excerpts from your website's contents). Search does not
#           include providing AI-generated search summaries.
# ai-input: inputting content into one or more AI models (e.g., retrieval
#           augmented generation, grounding, or other real-time taking of content for
#           generative AI search answers).
# ai-train: training or fine-tuning AI models.

# ANY RESTRICTIONS EXPRESSED VIA CONTENT SIGNALS ARE EXPRESS RESERVATIONS OF
# RIGHTS UNDER ARTICLE 4 OF THE EUROPEAN UNION DIRECTIVE 2019/790 ON COPYRIGHT
# AND RELATED RIGHTS IN THE DIGITAL SINGLE MARKET.

# BEGIN Cloudflare Managed content

User-agent: *
Content-Signal: search=yes,ai-train=no
Allow: /

User-agent: Amazonbot
Disallow: /

User-agent: Applebot-Extended
Disallow: /

User-agent: Bytespider
Disallow: /

User-agent: CCBot
Disallow: /

User-agent: ClaudeBot
Disallow: /

User-agent: Google-Extended
Disallow: /

User-agent: GPTBot
Disallow: /

User-agent: meta-externalagent
Disallow: /

# END Cloudflare Managed Content

# Block known bad bots and aggressive scrapers

User-agent: MJ12bot
Disallow: /

User-agent: Mediapartners-Google
Disallow: /

User-agent: IsraBot
Disallow: /

User-agent: Orthogaffe
Disallow: /

User-agent: UbiCrawler
Disallow: /

User-agent: DOC
Disallow: /

User-agent: Zao
Disallow: /

User-agent: sitecheck.internetseer.com
Disallow: /

User-agent: Zealbot
Disallow: /

User-agent: MSIECrawler
Disallow: /

User-agent: SiteSnagger
Disallow: /

User-agent: WebStripper
Disallow: /

User-agent: WebCopier
Disallow: /

User-agent: Fetch
Disallow: /

User-agent: Offline Explorer
Disallow: /

User-agent: Teleport
Disallow: /

User-agent: TeleportPro
Disallow: /

User-agent: WebZIP
Disallow: /

User-agent: linko
Disallow: /

User-agent: HTTrack
Disallow: /

User-agent: Microsoft.URL.Control
Disallow: /

User-agent: Xenu
Disallow: /

User-agent: larbin
Disallow: /

User-agent: libwww
Disallow: /

User-agent: ZyBORG
Disallow: /

User-agent: Download Ninja
Disallow: /

User-agent: fast
Disallow: /

User-agent: grub-client
Disallow: /

User-agent: k2spider
Disallow: /

User-agent: NPBot
Disallow: /

User-agent: WebReaper
Disallow: /

# AI and LLM crawlers

User-agent: Omgilibot
Disallow: /

User-agent: GPTBot
Disallow: /

User-agent: ChatGPT-User
Disallow: /

User-agent: openai-crawler
Disallow: /

User-agent: anthropic-ai
Disallow: /

User-agent: Claude-Web
Disallow: /

User-agent: Google-Extended
Disallow: /

User-agent: PerplexityBot
Disallow: /

User-agent: YouBot
Disallow: /

User-agent: Amazonbot
Disallow: /

User-agent: CCBot
Disallow: /

User-agent: Applebot
Disallow: /

User-agent: facebookexternalhit
Disallow: /

User-agent: MetaAI-Bot
Disallow: /

User-agent: HuggingFaceBot
Disallow: /

# Common scraping tools (only allow /api)

User-agent: Scrapy
Disallow: /
Allow: /api/

User-agent: python-requests
Disallow: /
Allow: /api/

User-agent: curl
Disallow: /
Allow: /api/

User-agent: Wget
Disallow: /
Allow: /api/

# General restrictions for all bots

User-agent: *
Disallow: /admin
Disallow: /alpha
Disallow: /attachment
Disallow: /comments/with
Disallow: /contest
Disallow: /contestInvitation
Disallow: /contestRegistrants
Disallow: /contestRegistration
Disallow: /contests/with
Disallow: /css
Disallow: /data
Disallow: /enter
Disallow: /gifts
Disallow: /trustList
Disallow: /group
Disallow: /gym/edit
Disallow: /images
Disallow: /js
Disallow: /list/view
Disallow: /lists
Disallow: /lists/edit
Disallow: /lists/new
Disallow: /logout
Disallow: /markitup
Disallow: /mashups
Disallow: /modules
Disallow: /printEntry
Disallow: /problemset/standings
Disallow: /problemset/status
Disallow: /problemset/submit
Disallow: /proposals
Disallow: /ratings
Disallow: /ratings/page
Disallow: /recent-actions
Disallow: /register
Disallow: /renderer
Disallow: /site
Disallow: /scripts
Disallow: /search
Disallow: /settings
Disallow: /society
Disallow: /spectator
Disallow: /st.codeforces.com
Disallow: /submissions
Disallow: */submission/*
Disallow: /support
Disallow: /system
Disallow: /teams/invite
Disallow: /teams/with
Disallow: /top-contributed
Disallow: /u
Disallow: /unsubscribe
Disallow: /uploadfile
Disallow: /user
Disallow: /userForm
Disallow: /userFormFieldValue/download
Disallow: /userform
Disallow: /userlist
Disallow: /users
Disallow: /usertalk
Disallow: /verifyme