Training Materials (2026)

Level A

Week 7 (14 Feb 2026)

Competitive Programming, Big-O

Week 8 (21 Feb 2026)

Dynamic Programming (II)

Week 9 (28 Feb 2026)

Graph (III)

Week 10 (7 Mar 2026)

Data Structures (IV)

Week 11 (14 Mar 2026)

Graph (IV)

Week 12 (21 Mar 2026)

Dynamic Programming (III)

Week 15 (11 Apr 2026)

Graph (V)

Week 16 (18 Apr 2026)

Flow and Graph Matching (I)

Week 17 (25 Apr 2026)

Flow and Graph Matching (II)

Week 18 (2 May 2026)

Misc Problem Discussion

Level B

Week 7 (14 Feb 2026)

N/A

Week 8 (21 Feb 2026)

Programming in C++

Week 9 (28 Feb 2026)

Optimization

Week 10 (7 Mar 2026)

Data Structures (II)

Week 11 (14 Mar 2026)

Graph (I)

Week 12 (21 Mar 2026)

Dynamic Programming (I)

Week 15 (11 Apr 2026)

Mathematics in OI (I)

Week 16 (18 Apr 2026)

Graph (II)

Week 17 (25 Apr 2026)

Data Structures (III)

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)

Introduction to Linux

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)

Game Theory

Week 18 (2 May 2026)

Mathematics in OI (II)
TFT Contest Environment Tips

Contest Materials

Mini Competition 0 (14 Feb 2026)

Editorial

Mini Competition 1 (7 Mar 2026)

Editorial

Mini Competition 2 (21 Mar 2026)

Editorial

EGOI Team Formation Test (28 Mar 2026)

Digit Puzzle II
Closing Ceremony
Annoying Advertisements II
Mountains

Mini Competition (Teams) (11 Apr 2026)

Editorial

Mini Competition 3 (25 Apr 2026)

Editorial