Selection for IOI is through Malaysian Computing Challenge.

Malaysian Computing Challenge
Malaysian Computing Challenge

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Official MCC website

Official IOI website

Selection Process

The MCC, MCO and APIO are the competitions used in Malaysia to shortlist contestants. The top 4 contestants will be selected to the IOI.

  1. December: Malaysian Computing Challenge (MCC)
  2. Dec-Feb: Malaysian Computing Olympiad (MCO) Qualifying Rounds
  3. Apr: Malaysian Computing Olympiad (MCO) ~ 30 participants
  4. May: Asia Pacific Informatics Olympiad (APIO) ~ 30 participants, only 6 official participants
  5. August: International Olympiad in Informatics (IOI)

based on IOI 2022 Selection


The International Olympiad in Informatics (IOI) is an annual competitive programming Olympiad for secondary school students. It is the second-largest science olympiad, after International Mathematical Olympiad, in terms of the number of participating countries. The first IOI was held in 1989 in Pravetz, Bulgaria.


The contest consists of six problems, each worth 100 points for a maximum of 600 points. It is held over two consecutive days, each day having 5 hours to solve three problems.


According to the IOI Regulations 2021,

A Contestant is a student who

  1. for the majority of the period 1 September to 31 December in the year before IOI’n:
    • was enrolled in a school at a level of secondary education or lower, in the Country they are representing; and
    • was not enrolled in a degree programme at a tertiary education institution with a half-time or greater load. Exceptions to this may be requested through the IC. Students who are studying abroad may instead represent the Country of their nationality.
  2. is not older than twenty years on the 1st of July of the year of IOI’n.

In short, a contestant must be a secondary high school Malaysian student up to 20 years old.

Learning Materials

Programming Platforms

If you are an IOI alumnus, you can help us complete this page by registering first. Thank you.

What is IOI? Talk by Mr. Tan Wei Xin


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