Southeast Asia Team Selection Test

Proudly Sponsored by Hudson River Trading

Southeast Asia Team Selection Test (SEATST) is a two-day contest primarily used for International Olympiad in Informatics (IOI) selection in Southeast Asian countries.

SEATST 2026 is planned to be held on 23 and 24 May 2026, 1-6 pm (GMT+8).

SEATST 2025 was used for the IOI 2025 selections of Singapore, Indonesia, Malaysia and Pakistan. The SEATST 2025 problems are available here as a reference: Day 1, Day 2.

All ASEAN member states are welcomed to participate in SEATST 2026 free of charge. Non-ASEAN member states can also use our TST, but will have to pay a small participation fee of 20 SGD per contestant.

SEATST replaced APIO as a crucial component of IOI selection in Singapore. We have received excellent feedback from Singaporean students comparing SEATST and APIO in IOI selections.

For any enquiries, please contact us at sc.seatst@gmail.com.