International Olympiad in Informatics

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Prepare and practice for IOI + get better at competitive programming + learn algorithms in a fun way with animations and videos!

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Introduce yourself!

Just add a post to this discussion introducing yourself, what your experience level is, what you're looking for, etc.

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Category: International Olympiad in Informatics

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Shivang Goel13w

Hi people! I hope all is well with everyone. I am a digital marketer just started out in the industry. I just found an amazing website Find Top Ten Ranks which ranks top 10 listings under each category. Read blog Top 10 Schools in Gurugram.

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Pravin Shahi14w

i am praveen shahi from class 10th. i am a total newbie to programming.

i actually started learning programming from a very ...

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Aaryan Pakhrani44w

Hello,I'm Aaryan I like to code in my free time newly completed python and started with data science.I just wanted to know about how can I get started in competitive programming as I want to take part in ICO.

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Competitive Programming websites

There are a bazillion different websites for competitive programming out there. Codeforces, SPOJ, TopCoder, Timus, CodeChef, USACO, and on and on. This discussion is a place to highlight the interesting features of each website and tell us which one you like best.

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Competitive Programming – topcoder

https://topcoder.com/community/competitive%20programming/

USA Computing Olympiad

http://usaco.org/

Sphere Online Judge (SPOJ)

http://spoj.com/

Programming Competition,Programming Contest,Online Computer Programming

https://codechef.com/

http://codeforces.com/

Category: International Olympiad in Informatics

Top comments in this discussion

Here are some of my personal favourite websites to practice competitive coding:

LeetCode, Interview Bit, GeekforGeeks, Hackerrank.

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Udit SanghiAiming for gold. · 3y

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Tanavya DimriA 16 year old compet… · 3y

University of Valladolid Online Judge

I just wanted to suggest another site for tons of interesting questions, if you already didn't know of it, the University ...

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NaN.

course

International Olympiad in Informatics Training: Path to Gold

Overview

This is a 100+ part playbook that takes you from basic C++ programming to a Gold medal at IOI. It has tutorials on 30+ algorithms and data structures, and 75+ problems based on those topics, sorted by increasing difficulty.

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Syllabus

C++ review

2 problems to check if you satisfy C++ pre-requisites.

[LEADGAME] Lead Game
Free
2 mins
[ZCO14001] Video Game (ZCO 2014: India)
Free
2 mins

Beginner (Zonal Level)

What are algorithms? Sorting algorithms (quick-sort, merge-sort). Binary search. Dynamic programming. Along with ~30 problems, and 5 quizzes.

Start this course

[LEADGAME] Lead Game

Category: International Olympiad in Informatics

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Taksh Pratap SinghProgrammer: interest… · 2y

You have to calculate everything by yourself. Using computers to code and solve is not permitted.

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Query Regarding ZIO.

Hi, I want to know, Are we allowed to use computer o...

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NaN.

course

C++ / Java / Python for Competitive Programming

Overview

This playlist covers the required amount of C++ / Java / Python knowledge you need for programming contests such as Olympiad in Informatics, CodeChef, Codeforces, etc.

Expected time to completion: 5-10 sessions.

The programming language topics covered are input-ou...

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Syllabus

[AIO333] Addition
Free
3 mins
[AIO342] Sitting or Standing?
Free
3 mins
[AIO362] Mixed Fraction
Free
2 mins
[AIO372] A Mindbending Scenario
Free
3 mins
[AIO382] The Tremendous Tak-Tak Tree
Free
3 mins

Start this course

[AIO333] Addition

Category: International Olympiad in Informatics

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Navdeep Sandhu2y

I have completed every question. I am not able to generate certificate for the course. Do we need to do something else as well to qualify for the certificate.

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Manchun Kumar2y

Thank you for sharing great content regarding C# tutorial. i thinks, you should also share C# interview Questions better for C# learner.

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Mohammad Sameer#UglyAF#LazyAF · 2y

If I can solve every single problem of this playlist, does that mean I am well prepared for the coding (just the coding, not prolem solving) of IOI?

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[Poll] What other communities would you like to see here?

Like a reply to up-vote for the community. If a community of your choice does not exist, then add a reply (one community per reply).

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Category: International Olympiad in Informatics

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Kulesh VandanA blogger, coder, po… · 3y

USACO community

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Amey Narkhede3y

Cryptography & Cryptanalysis or may be just cryptography

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Kulesh VandanA blogger, coder, po… · 3y

I also wanna see a community on NatGeo's Global event series-

MARS

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discussion

Advanced concepts and problems

Concepts

Minimum Spanning Tree (Prim's algorithm and Kruskal's algorithm)
Correctness of Prim's algorithm and Kruskal's algorithm
Segment Trees and Binary Indexed Trees
Computational Geometry
Strongly connected components
Articulation points
Dynamic programming on trees
Algorithmic Games
Maximum Bipartite Matching O(VE) algorithm
Tries

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Category: International Olympiad in Informatics

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Rezwan ArefinLove Competitive Pro… · 3y

HLD is "Excluded but considering Inclusion" in IOI syllabus. If you've seen some HLD problems in OI, then there might be some other solution not involving HLD.

Like you have edge cost updates, and path queries, O...

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Keshav DhandhaniaIOI medalist. DM me … · 3y

No. I think only those two problems from IOI are machine-learning-y.

There are some other problems which focus on information theory. Trying to communicate information between two people in a...

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Kuntal MajumderLinux Fanatic, Vecto… · 3y

Wow , I never knew IOI also had this kind of problems , are there any more like this , or do you know where can I practice this kind of problems ?

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