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International Olympiad in Informatics (IOI)

International Olympiad in Informatics (IOI) Overview

International Olympiad in Informatics, or IOI, is an International-level Olympiad in Informatics, held annually for students pursuing higher secondary education and not enrolled in any university.
Informatics combines the mathematics and computer application disciplines together. The subject has gained a lot of interest from students, and the olympiad is a means to promote it. The International Olympiad in Informatics 2023 will be held in Szeged, Hungary, from August 28 to September 4, 2023.

IOI Objective

IOI is conducted with the following objectives:
  • To help students build international connections among informatics educators and computer scientists.
  • To promote informatics among young people.
  • To influence a healthy competition, thereby recognising talented young people and promoting their interest in informatics among them.
  • To encourage countries to organise future IOI.

IOI Schedule

This will be the 35th International Olympiad in Informatics (IOI), 2023. It was conducted in Szeged, Hungary, from 28th August to - 4th September 2023.
Dates (In 2023) Event
To be announced Arrival of Participants
To be announced Practice sessions
To be announced Opening Ceremony
To be announced Contest Day 1, Analysis Mode and Appeal Submission
To be announced Excursion,  Huawei Talks, Free Time
To be announced Contest Day 2, Analysis Mode and Appeal Submission
To be announced Jane Street Estimathon, lecture by Nomadic Labs, Casual Q&A meet up
To be announced Closing Ceremony
To be announced Departure

IOI Syllabus

Mathematics
  • Arithmetics and Geometry
    • Integers, operations (incl. exponentiation), comparison
    • Basic properties of integers (sign, parity, divisibility)
    • Basic modular arithmetic: addition, subtraction, multiplication
    • Prime numbers
    • Fractions, percentages
    • Line, line segment, angle, triangle, rectangle, square, circle
    • Point, vector, coordinates in the plane
    • Polygon (vertex, side/edge, simple, convex, inside, area)
    • Euclidean distances
    • Pythagorean theorem
  • Discrete Structures (DS)
    • Functions, Relations, and Sets
    • Basic Logic
    • Proof Techniques
    • Basics of Counting
    • Graphs and Trees
    • Discrete probability
Computing Science
  • Programming Fundamentals
    • Fundamental Programming Constructs
    • Algorithms And Problem-Solving
    • Fundamental Data Structures
    • Recursion
    • Event-Driven Programming
  • Algorithms and Complexity
    • Basic algorithmic analysis
    • Algorithmic strategies
    • Algorithms
    • Data structures
    • Distributed algorithms
    • Basic computability
    • The complexity classes P and NP
    • Automata and grammars
    • Advanced algorithmic analysis
    • Cryptographic algorithms
    • Geometric algorithms
    • Parallel algorithms
Other Areas in Computing Science
  • Architecture and Organisation
  • Operating Systems
  • Net-Centric Computing
  • Programming Languages
  • Human-Computer Interaction
  • Intelligent Systems
  • Information Management
  • Social and Professional Issues
Computer Literacy Software Engineering 
  • Software Design
  • Using APIs
  • Software Tools and Environments
  • Software Processes
  • Software Requirements and Specification
  • Software Validation
  • Software Evolution
  • Software Project Management
  • Component-Based Computing
  • Formal Methods

IOI Eligibility

For students to be eligible for IOI 2023, they must qualify for the IOI as per the eligibility guidelines mentioned below.
  • The student is currently in higher secondary (Class 12).
  • The student is not enrolled in any university.
  • The student is not older than 20 years on 1 July of the year of IOI.

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