Hand-Curated 800–1000 Problem Sheet for Div 3/4 Beginners

Revision en2, by kilobyte136, 2026-04-13 09:17:18

Hey codeforces,

I built a curated problem sheet for people grinding Div 3/4. Link: https://cf-sheet.vercel.app/

preview

What's on it:

  • 70 problems across 800/900/1000, ordered by actual learning difficulty (not just raw CF rating — some 900s are easier than 800s and I explain why)
  • Div 3 / Div 4 badge on every problem
  • URL-hash persistence — bookmark your progress, no account needed
  • 22 recommended Div 3/4 contest rounds to attempt after the sheet

CF Handle Tracker (tracker page):

  • Type your CF handle → it checks your submission history via the CF API
  • Auto-marks everything you've already AC'd on the sheet
  • No login, no OAuth, nothing stored on my end

Curation Criteria page explains:

  • Why CF ratings can be misleading (crowd-sourced from contest performance)
  • The 5 rules every problem on the sheet must satisfy
  • How to suggest additions or removals

Feedback and problem suggestions welcome in the comments. If you think something shouldn't be here, cite which rule it violates (R1–R5) and suggest a replacement.

Tags problem solving, cf, contribution, beginner, practice, div4, div3, problemset

History

 
 
 
 
Revisions
 
 
  Rev. Lang. By When Δ Comment
en5 English kilobyte136 2026-04-14 13:00:26 96 Tiny change: ' from.\n\nA preview\' -> ' from.\n\n## A preview\'
en4 English kilobyte136 2026-04-14 12:46:36 1792 fixed tone and added a feedback system to the site. fixed the contest redirection issues.
en3 English kilobyte136 2026-04-13 09:19:35 80
en2 English kilobyte136 2026-04-13 09:17:18 1130
en1 English kilobyte136 2026-04-12 20:31:56 397 Initial revision (published)