Level A
Week 7 (14 Feb 2026)
Competitive Programming, Big-O
Week 8 (21 Feb 2026)
Week 9 (28 Feb 2026)
Week 10 (7 Mar 2026)
Week 11 (14 Mar 2026)
Week 12 (21 Mar 2026)
Week 15 (11 Apr 2026)
Week 16 (18 Apr 2026)
Week 17 (25 Apr 2026)
Week 18 (2 May 2026)
Level B
Week 7 (14 Feb 2026)
N/A
Week 8 (21 Feb 2026)
Week 9 (28 Feb 2026)
Week 10 (7 Mar 2026)
Week 11 (14 Mar 2026)
Week 12 (21 Mar 2026)
Week 15 (11 Apr 2026)
Week 16 (18 Apr 2026)
Week 17 (25 Apr 2026)
PM Sessions
Week 7 (14 Feb 2026)
Solution to HKOI 2025/26 –
- S261 Tribal Occupation
- S262 Even the Rhythm
- S263 Set
- S264 Triangular Territories
- J261 Cubic Date
- J262 Bowling Score Recovery
- J263 Spot-Check Debugging
- J264 Shy Students
Solution to HKGOI 2025/26 –
- G261 Sushi Go
- G262 Removing Letters
- G263 Screws
- G264 Infinite Whack-A-Mole
- G265 Mini Metro
- G266 Full Speed Ahead
Week 8 (21 Feb 2026)
Week 9 (28 Feb 2026)
Constructive Algorithms, Special Tasks (I)
Week 11 (14 Mar 2026)
Constructive Algorithms, Special Tasks (II)
Week 15 (18 Apr 2026)
Week 18 (2 May 2026)
Contest Materials
Mini Competition 0 (14 Feb 2026)
Mini Competition 1 (7 Mar 2026)
Mini Competition 2 (21 Mar 2026)
EGOI Team Formation Test (28 Mar 2026)
Digit Puzzle II
Closing Ceremony
Annoying Advertisements II
Mountains
Mini Competition (Teams) (11 Apr 2026)
Mini Competition 3 (25 Apr 2026)
Team Formation Test Day 1 (23 May 2026)
Gem Collection
Mini Metro II
Triple Keys
Team Formation Test Day 2 (24 May 2026)
Chained Together
Chess Tournament
Peacock Aviary
Mini Competition / NOI (28 Jun 2026)
Mini Competition / IOI (30 Jun 2026)
Training Camp
DSU on Tree
String Algorithms
Introduction to Logic Puzzles
Parallel Programming in C++
AI Competition (Bomberman)
Hashing Techniques