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Indian Computing Olympiad, 2023


  • Registration for ZIO-2023 and ZCO-2023 is separate. Students can write both exams and qualify through either one for INOI-2023 to be held in January–February, 2023.

  • Students who won gold, silver or bronze medals in INOI-2022 qualify directly for INOI-2023, without writing ZIO-2023 or ZCO-2023. However, these students must register for either ZIO-2023 or (preferrably) ZCO-2023 and send their registration details to

Zonal Computing Olympiad, 2023 (ZCO-2023)

The Zonal Computing Olympiad, 2023 (ZCO-2023) will be held from 2:00 pm to 5:00 pm on Sunday, 18 December, 2022 at centres across the country. ZCO will be conducted in cooperation with CodeChef. Online registration is open from 20 October, 2022 to 5 December, 2022.

Exam centres

Centres for ZCO-2023 will be organized at the following cities.

Ahmedabad, Allahabad, Bengaluru, Bhopal, Chandigarh, Chennai, Cochin, Coimbatore, Guwahati, Gwalior, Hyderabad, Indore, Jaipur, Kanpur, Kolkata, Kota, Lucknow, Mangalore, Mumbai, Nagpur, New Delhi, Patna, Pune, Raipur, Ranchi, Thiruvananthapuram, Visakhapatnam.

The address of the exam centre in each city will be announced after registrations close.

Individual registration

  • To register, use this link and click on BOOK NOW on the right to proceed.

  • The registration fee is Rs 472 (Rs 400 + GST), to be paid online (internet banking, debit card, credit card, UPI).

  • Registration for ZCO-2023 is open till 5 December, 2022.

  • Admit cards will be available approximately 5 days before the exam.

Bulk registration

  • Bulk registration is only available for registering 10 or more participants at the same time. For details, please write to

Exam details

  • ZCO-2023 is a programming test. The languages allowed for ZCO-2023 are C, C++, Java and Python. Details about compilers, IDEs and other aspects of the contest environment will be announced soon.

  • The syllabus for ZCO is the list of Basic Topics in the ICO Online Study Material

  • Previous question papers and solutions are available in the ICO Archives.

  • You can also solve some past ZCO questions online at CodeChef's ZCO Practice site.

Zonal Informatics Olympiad, 2023 (ZIO-2023)

The Zonal Informatics Olympiad, 2023 (ZIO-2023) will be held on Sunday, 4 December, 2022 from 2:00 pm to 5:00 pm at centres across the country. ZIO will be conducted in cooperation with TCS iON, a division of Tata Consultancy Services. Registration is closed.

Exam centres

Addresses of the exam centres for ZIO-2023 are now available.

Admit Cards have been sent by email on 30 November. If you have not received your Admit Card, or if any correction is needed, please send email to

Exam details

International Olympiads, 2022

European Girls Olympiad in Informatics, 2022

The European Girls Olympiad in Informatics 2022 was organized in Antalya, Turkey during the period 16–23 October, 2022. The following team represented India at EGOI-2022, selected based on their performance in IOITC-2022.

  • Khooshi Asmi, Surendranath Centenary School, Ranchi
  • Devika Umesh Bej, Hiranandani Foundation School, Thane
  • Megha Hegde, AECS Magnolia Maaruti Public School, Bangalore
  • Neha Singirikonda, Chirec International School, Hyderabad

The Leader of the Indian contingent was Saraswati Nanoti, from IIT Gandhinagar.

IOI 2022 Team Photo

Khooshi, Devika, Saraswati, Neha, Megha

Megha Hegde won a silver medal and Devika Umesh Bej won a bronze medal.

The Indian team's travel to EGOI-2022 was sponsored by Sasken.

International Olympiad in Informatics, 2022 (IOI-2022)

The International Olympiad in Informatics, 2022 (IOI-2022) was hosted by Indonesia during the period 7–15 August, 2022. The team that represented India at IOI-2022 was as follows.

  • Paras Kasmalkar, The Orchid School, Pune
  • Harshin Posina, FIITJEE School, Hyderabad
  • Ritul Kumar Singh, Delhi Public School, Bokaro Steel City
  • Kshitij Sodani, Delhi Public School, Gurgaon
IOI 2022 Team Photo
Harshin, Ritul, Kshitij, Paras

Paras Kasmalkar and Kshitij Sodani won silver medals. Harshin Posina and Ritul Kumar Singh won bronze medals.

The Leader and Deputy Leader of the Indian contingent were Madhavan Mukund and K Narayan Kumar, both from Chennai Mathematical Institute, Chennai.

The Indian team's travel to IOI-2022 was sponsored by Sasken.

Asia-Pacific Informatics Olympiad, 2022 (APIO-2022)

The Asia-Pacific Informatics Olympiad 2022 (APIO-2022) was organized online by Egypt during the period 28–29 May, 2022. All students who qualified for IOITC-2022 or received a medal in INOI-2022 were invited to represent India at APIO-2022. The top six contestants from each country are eligible to receive medals at APIO.

Indian won three medals at APIO-2022. Kshitij Sodani won a silver medal. Paras Kasmalkar and Siddhant Attavar won bronze medals

International Olympiad in Informatics Training Camp, 2022 (IOITC-2022)

The Indian team for IOI is selected at the International Olympiad in Informatics Training Camp (IOITC). IOITC-2022 began online in April, 2022 and concluded with an in-person selection camp held in Chennai during the period 14 June–19 June, 2022.

Faculty for ZIO/ZCO/INOI/IOITC-2022:

  • Jatin Yadav (Coordinator)
  • Anay Karnik (Problem Setting and Testing, IOITC)
  • Ashish Gupta (Statement Verification, IOITC)
  • Jishnu Roychoudhury (Problem Setting, IOITC)
  • Soumyaditya Choudhari (Problem Setting, INOI)
  • Sreejata Kishor Bhattacharya (Problem Setting, IOITC)
  • Udit Sanghi (Problem Setting and Testing, IOITC)
  • Utkarsh Gupta (Problem Setting, IOITC)

We thank Sasken for sponsoring the camp and Chennai Mathematical Institute for hosting the camp.

Question papers and other material from …

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