---
id: contests
title: Contests
author: Benjamin Qi
description: Contests that I participate in as well as a few tools.
---
See [clist.by](https://clist.by/coder/bqi343/) for an extensive list of contests.
Make sure to [upsolve](https://en.wiktionary.org/wiki/upsolve) after the contest ends!
## Contests that I regularly participate in
- [AtCoder](https://beta.atcoder.jp/contests/archive)
- probably the highest quality, although difficulty isn't always reasonable
- Contests
- Beginner / Regular: 4 or 6 problems, ~100 min
- Grand: 6 problems, ~110 min
- [Visualizer](https://kenkoooo.com/atcoder/#/table/Benq)
- I've done nearly all of the AGC problems.
- [Codeforces](http://codeforces.com/problemset)
- Contests
- Div 1/2/3/(4?): 5-6 problems (with some variations), 2 to 2.5 hrs
- Archive
- problem quality, difficulty ratings are ok but not always great
- [Topcoder](https://www.topcoder.com/my-dashboard/)
- Div 2, Div 1
- 75 min coding, 15 min challenge
- Solutions only tested after contest!
- [Don Mills OJ](http://dmoj.ca/)
- at least one contest every month during school year
## Other Websites
- [Google Kickstart](https://codingcompetitions.withgoogle.com/kickstart)
- Feb - Nov
- [Kattis](https://open.kattis.com/)
- misc ICPC contests
- [HackerEarth](http://hackerearth.com/)
- Monthly "Easy"
- quality is not always good
- [Codechef](http://codechef.com/)
- Lunchtime, Cookoff
- quality is not always good
The following websites do not hold regular contests anymore, but they're still worth looking at.
- [CS Academy](https://csacademy.com/contest/archive/)
- Contests
- Div 2: 5 problems, 2 hrs
- Open: 7 problems, 2 hrs
- no more? D:
- Archive
- short statements, good editorials
- solve statistics
- ability to view best solutions
- I've done nearly all of the problems.
- [HackerRank](https://www.hackerrank.com/dashboard)
- hack the interview!!
## Annual Contests
25 from R3
25 from R3
4 from SRMs, 10 from R4, 2 from wildcard
8 from AGC
## US High School
Only considering contests which allow C++ since the others aren't legit. (add more?)
December, online, teams of 3, 5 hours, past problems on Kattis
Decmeber, online, individual, 4 hours
April, teams of 3, 3 hours, 2019 problems
online, teams of 4, 4 hours
## Codeforces Tools
- [Stopstalk](https://www.stopstalk.com)
- [Code Drills](http://code-drills.com/)
- [CF Visualizer](http://cfviz.netlify.com/compare.html)
- [CF Rating Predictor](https://chrome.google.com/webstore/detail/cf-predictor/ocfloejijfhhkkdmheodbaanephbnfhn)
- [CF Command Line](https://codeforces.com/blog/entry/66552)
- [CF Editor](https://codeforces.com/blog/entry/72952)
- [CF Enhancer](https://chrome.google.com/webstore/detail/codeforces-enhancer/ocmandagmgmkcplckgnfgaokpgkfenmp)
- no longer works
## Contest Tools
- [2D Geo Visualizer](https://codeforces.com/blog/entry/70330)
- [CSAcademy Graph Editor (+ Geo Visualizer + Diff Tool)](https://csacademy.com/app/graph_editor/)
- [Desmos Grapher](https://www.desmos.com/calculator)
- [Wolfram Alpha](https://www.wolframalpha.com/)
- [OEIS](https://oeis.org/)