HKOI Online Judge ( is originally the training platform for the HKOI Training Team. Students can submit programs to improve their programming and problem solving skills. Starting from the 2015/16 school year, the system opens to HKACE member schools (secondary schools).

(1) Suitable for students preparing for HKOI and/or studying HKDSE ICT.
(2) 400+ tasks and counting. 30+ fundamental tasks.
(3) Bilingual interface. Choice of Pascal, C, C++.
(4) Teachers may monitor students’ progress using their administrator accounts.

Enter HKOI Online Judge

Presentation slides

Sign-up / Renew

HKACE School Membership renewal

1. Complete the School Membership application form
2. Enclose a crossed cheque for $300 as annual membership fee. Cheque should be made payable to The Hong Kong Association for Computer Education. Please write down the name of your school at the back of the cheque.
3. Mail the completed form and cheque to the HKACE office. (Note: the previous address accepts mail until November)

The Hong Kong Association for Computer Education
Room 613, Caritas Institute of Higher Education
18 Chui Ling Road, Tseung Kwan O, N.T.

4. Existing School Admin accounts will be renewed automatically after payment is received. We will also notify you by email.

New school sign-up

4. Complete the HKOI Online Judge application form
5. The accounts will be opened after payment is received. We will also notify you by email.

Request additional accounts / disable unused accounts / other changes

Please complete the Change Request form. We will notify you by email after the changes has been completed.