Training Hub

News: See below (updated Mon 15 Aug 2022).
Forums: Last post made Tue 23 Dec 2014.

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Welcome to the online training site for the Australian Informatics Olympiad programme!

Below you can view past AIO and FARIO problems. Register an account to get your solutions marked by our online evaluator.

Are you new to orac? Are you new to programming in general? Check out our getting started guide.

Set	Problem
Starter Problems 1	Addition
	Sitting or Standing?
	Mixed Fraction
	A Mindbending Scenario
Starter Problems 2	The Tremendous Tak-Tak Tree
	Counting to Infinity
	A Dish Best Served Cold
	Drought
Starter Problems 3	Encyclopædia
	Dictionary
	Triple Hunting
	Friendlist
AIO 2020	Baubles
	Cookies
	Ghost Encounters
	Tennis Robot
	Ladybugs II
	Beach Umbrellas
AIO 2019	Vases
	RPS
	Hiring Monks
	Medusa's Snakes
	Evading Capture
	Lollipops, Sweets and Chocolates II
AIO 2018 (Intermediate)	Street Construction
	Castle Cavalry
	Cloud Cover
	Janitor
AIO 2018 (Senior)	Street Construction
	Cloud Cover
	Janitor
	Detective
AIO 2017 (Intermediate)	Missing Mango
	Tag
	Snake Charmer
	Chimera II
AIO 2017 (Senior)	Concealed Coconut
	Snake Charmer
	Chimera II
	Lollipops, Sweets and Chocolates
AIO 2016 (Intermediate)	Magic Squares
	Farmer Drama
	Sculpture II
AIO 2016 (Senior)	Probe
	Balancing Aeroplanes II
	Carmen Sanfrancisco II: Bank Robbing
AIO 2015 (Intermediate)	Snap Dragons II
	Wet Chairs
	Ruckus League
AIO 2015 (Senior)	Wet Chairs
	Ruckus League
	Snap Dragons III: Binary Snap
AIO 2014 (Intermediate)	Pygmy Hippos
	Corey's Party
	Chimera
AIO 2014 (Senior)	Giant Hippos
	Chimera
	Wormhole
AIO 2013 (Intermediate)	Archery
	Frog
	Save-It
AIO 2013 (Senior)	Frog
	Save-It
	Artclass
AIO 2012 (Intermediate)	NORT
	Cabinet Shuffle
	King Arthur II
AIO 2012 (Senior)	Posters
	Cabinet Shuffle
	Awesome Frog
AIO 2011 (Intermediate)	Pirates
	Sleight of Hand
	Tickets
AIO 2011 (Senior)	Alien
	Slicing Paradise
	Restaurants II
AIO 2010 (Intermediate)	Ninjas
	Choreography
	Oil
AIO 2010 (Senior)	Heatwave
	Snap Dragons
	Island
AIO 2009 (Intermediate)	Travelling Salesperson
	Nomnomnom
	Safe Cracking
	Carmen Sanfrancisco
AIO 2009 (Senior)	Nomnomnom
	Treasure Hunt
	Carmen Sanfrancisco
	No (One) Left
AIO 2008 (Intermediate)	Ladybugs
	Atlantis Rising
	Settling Debts
	Crowd Surfing
AIO 2008 (Senior)	Settling Debts
	Crowd Surfing
	Chocolate Shop
	Russian Dolls
AIO 2007 (Intermediate)	Wetlands
	Superphone
	Mansion
	Invasion
AIO 2007 (Senior)	Mansion
	Invasion
	Restaurants
	Air Drop
AIO 2006 (Intermediate)	Fashion Statement
	Mouse Hunt
	Psychological Jujitsu
	Atlantis: The Beginning
AIO 2006 (Senior)	Ants
	Spies V: Voices in the Dark
	Atlantis: The Beginning
	Election
AIO 2005 (Intermediate)	Cute Numbers
	Curry
	Landmark
	Sculpture
AIO 2005 (Senior)	Curry
	Chimpanzee
	Sculpture
	Jigsaw
ACIO 2020: Contest 0	Sandwich Holes
	Bracelet Jewels
	Programming Pairs
	Snap Dragons: Accumulate
	Radio Transmission
	Battleship
ACIO 2020: Contest 1	Jogging
	Endgame
	Superheroes
ACIO 2020: Contest 2	Snap Tokens
	What. b. Shame!
	Lollipops, Sweets and Chocolates: GPS
ACIO 2020: Open Contest	Planet Battles: A New Land
	Black Panthers
	Vibe Check
AIC 1998	Shopping Malls
	Anagram Solver
	Building Integers
AIC 1999	Hailstone Sequences
	Hunt-a-Word
	Cartography
	King Arthur
AIC 2000	Academic Espionage
	Keeping Secrets
	Analysing Bach
	Displaying Paintings
AIC 2001	Flowers
	Cartography III
	Spies
	Mobiles
AIC 2002	Halloween
	Cartography II
	Bureaucratic Bungling
	Packing Pentominoes
AIC 2003	Culture
	Word Wrap
	Stacking Numbers
	Handwriting Recognition
AIC 2004 (Intermediate)	Bugs
	Genius
	AFL
	Atlantis
AIC 2004 (Senior)	Genius
	Zig-Zag Cipher
	Atlantis
	Bouncy Ball
AIIO 2006	Spies IV
	Pipes
	Hard Drive
AIIO 2007	Snurgle Holders
	Cats III: Off With Their Heads
	Trains
AIIO 2008	Diva III: A Note Gone Sour
	Sunday Drive
	Train Network
AIIO 2009	Space Invaders
	IOI Team Selection
	Frogs
AIIO 2010	Nomnomnomnom: Can Has Dessert?
	Clam Oil
	Budgie Shots
AIIO 2011	World Bus Driving Championships
	Kiwileaks
	The Terrifying Canary-Bird
AIIO 2012	Time Warp
	Hopscootch
	Negotiations
AIIO 2013	Flatman's Tower
	Flight Planning II
	Vitamin D
AIIO 2014	The Treeless Trees
	Art, Key, Texture
	Memes
AIIO 2015	Friendly
	Going Home
	Riding Jetstreams
AIIO 2020	Metropole
	L-Bots
	Purview
Challenge Problems 1	Anagrammatic Primes
	Packing Pentominoes
	Nine Clocks
	Stargazing
FARIO 2004	Stargazing
	Blue
	Chariot Race
FARIO 2005	Mobile Construction Set
	Monkey Tour
	River
FARIO 2006	Guards
	Escape from Civilisation
	Belts
	Lucky Wheels of Doom
FARIO 2007	Rescue Robot
	Secret chamber of the Giza pyramid
	Architecture
	Global Warming
FARIO 2008	Graffiti
	Sledge Track
	Leaf Blower
	Rock Climbing
FARIO 2009	Bookshop
	Toy Factory
	Memories
	Fragrance
FARIO 2010	The FARIO Incident
	ABC
	Dating Site IT
	Human LCD
FARIO 2011	Bookshelf
	House of a Thousand Blades
	Life
	The Virus
FARIO 2012	Master Chef
	Happy Feet
	Blackout
FARIO 2013	Algo-Fu
	Super Maria
	Torusia
FARIO 2014	NSA
	Connect
	Super Maria II
FARIO 2015	The Nightlight
	Frequent Flyer
	Pam-Can Retires
FARIO 2016	No Ball
FARIO 2016	Hooliganism
FARIO 2017	Pair Programming
	Pyramid Cake
	Optimal Delivery
FARIO 2018	Shadow Architecture
FARIO 2018	Greed
FARIO 2019	Papa and Baby Frog
	Coloured Walkway
	Nav
FARIO 2020	Footwork
	Loss of Balance
	Emergency Reinforcement
Pre-camp Training	Stacks
	RPN Calc
	Curry
	Fashion Statement
	Fibonacci
	Twin Prime Conjecture
	Pairs
	Queues 2

News

IOI 2022 was hosted by Indonesia from the 7th to the 14th of August. Congratulations to the Australian team for earning four silver medals! The team placed 33rd, 63rd, 65th and 71st.

There are known issues with std::list, std::unordered_map and std::unordered_set, so please avoid use of these in your submissions for the time being.

It is recommended that you use our new training site, ORAC 2.