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usaco-guide/content/6_Plat/Olympiads.mdx
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---
id: oly
title: "Olympiads"
author: Benjamin Qi
description: Once you've reached Platinum, it may be helpful to practice with problems from other (inter)national olympiads.
---
> Hello, Which online judge should I practice more to do well in **IOI** ?
> the closest OJ for IOI style?
## [USACO](http://www.usaco.org/)
* Older Problems
* [TJ website](http://tjsct.wikidot.com/usaco/)
* [Korean website to submit ...](https://www.acmicpc.net/category/106)
* [USACO Training](http://train.usaco.org/usacogate)
* not particularly beginner-friendly but still helpful
* somewhat outdated in the sense that it lacks topics which are now quite common (ex. segment tree)
* if you're unsure about whether it will be useful, you might as well try it and see where you get stuck :P
* personally, I did the first five chapters in one summer (though I had to look up some hints ...)
* [article :o](https://www.usenix.org/legacy/bodinfo/bod/bodmarch10/future.pdf)
## [oj.uz](https://oj.uz/)
The [OI Checklist](https://oichecklist.pythonanywhere.com/) is a great way to track your progress. :)
<resources>
<resource source="IZhO" title="International Zhautykov Olympiad (Kazakhstan)" url="https://izho.kz/"></resource>
<resource source="APIO" title="Asia-Pacific Informatics Olympiad" url="http://apio-olympiad.org/"></resource>
<resource source="COCI" title="Croatian Open Contests in Informatics" url="http://hsin.hr/coci/">not full feedback ...</resource>
<resource source="JOI" title="Japanese Olympiad in Informatics" url="https://www.ioi-jp.org/"></resource>
<resource source="LMIO" title="Lithuanian Olympiad in Informatics" url="http://online.lmio.lt/"></resource>
<resource source="InfO(1) Cup" title="InfO(1) Cup" url="http://info1cup.com/"></resource>
</resources>
## [IOI](https://ioinformatics.org/)
Can submit on more recent problems on oj.uz. Also see the following:
- [Yandex](https://contest.yandex.com/ioi/)
- [WCIPEG](https://wcipeg.com/problems/cat%3Dioi%2Cshow%3D50)
- [DMOJ](https://dmoj.ca/problems/?category=5)
Misc:
- [IOI Syllabus](https://people.ksp.sk/~misof/ioi-syllabus/)
- [kostka - List of 2019 IOI Participants](http://weaselcrow.com/pro/cf/ioi/19/)
## [CSES](https://cses.fi/)
<resources>
<resource source="BOI" title="Baltic Olympiad in Informatics" url="http://www.boi2017.org/">2017 website</resource>
<resource source="CEOI" title="Central European Olympiad in Informatics" url="http://ceoi.inf.elte.hu/"> </resource>
</resources>
## Other
See the [IOI members page](https://ioinformatics.org/page/members/7) for additional links.
* [Poland](https://szkopul.edu.pl/portal/)
* [Solutions (in Polish)](https://www.oi.edu.pl/l/40/)
* [Canada](https://cemc.math.uwaterloo.ca/contests/computing.html)
* [WCIPEG](https://wcipeg.com/problems/cat%3Dccc%2Cshow%3D50)
* [DMOJ](https://dmoj.ca/problems/?category=24)
* [Philippines](https://noi.ph/past-problems/)
* [Indonesia](https://competition.ia-toki.org/contests)
* [Australia](https://orac.amt.edu.au/)
* [Italy](https://training.olinfo.it/#/overview)
* [International Informatics Olympiad in Teams](http://ioit.altervista.org/2018-teams-and-contests-.html) (IOIT)
* [Balkan Olympiad in Informatics](https://boi2019.epy.gr/) (2019 website)