IOIInternationalComputer Science
International Olympiad in Informatics — World
Organised by IOI / IARCS India teamOfficial Website ↗
World championship in competitive programming and algorithms. Two 5-hour sessions with algorithmic problems. India qualifies through IARCS: ZCO/ZIO → INOI → IOAI → IOI.
Eligibility
Top 4 from IOAI — represent India
Fee
Nil
Reg. Opens
N/A–N/A
Exam Date
Aug 2026
Level
International
Pathway Stage
National Entry
About this olympiad
World championship in competitive programming and algorithms. Two 5-hour sessions with algorithmic problems. India qualifies through IARCS: ZCO/ZIO → INOI → IOAI → IOI.
The pathway
Stage 5 of 5
How registration works
1
National selection through ZCO → ZIO → INOI → IOAI
2
Qualifying exams conducted by IARCS at iarcs.org.in.
How to prepare
Understand the syllabus
Focus on the core concepts of the Computer Science curriculum with a higher weightage on analytical problems.
Solve past papers
Practice with previous years' question papers to understand the exam pattern and marking scheme.
Notify Me
Get notified when IOI 2026 registration opens.
Quick Facts
TypeComputing Olympiad
International?Yes
Govt Recognized?No
Online Exam?No
Related olympiads
UCOSchool
Unified Cyber Olympiad (UCO)
Unified Council
Class 3–10
Reg: May–Aug
₹150
Individual Reg.