International Olympiad in Informatics (IOI) : 1989, Pravetz, Bulgaria

Year	Download
1989 Problem 1
1989 Problem 2
1989 Problem 3
1989 Problem 4
1989 Problem 5
1989 Problem 6

International Olympiad in Informatics (IOI) : 1990, Minsk, Byelorussia

Year	Download
1990 Round 1
1990 Round 2

International Olympiad in Informatics (IOI) : 1991, Athens, Greece

Year	Download
1991 Round 1
1991 Round 2

International Olympiad in Informatics (IOI) : 1992, Bonn, Germany

Year	Download
1992 Round 1
1992 Round 2

International Olympiad in Informatics (IOI) : 1993, Mendoza, Argentina

Year	Download
1993 Problem 1
1993 Problem 2
1993 Problem 3
1993 Problem 4

International Olympiad in Informatics (IOI) : 1994, Haninge, Sweden

Year	Download
1994 Day 1 : The Triangle
1994 Day 1 : The Castle
1994 Day 1: The Primes
1994 Day 2: The Clocks
1994 Day 2: The Buses
1994 Day 2: The Circle
1994 Solutions

International Olympiad in Informatics (IOI) : 1995, Eindhoven, The Netherlands

Year	Download
1995 Day 1 : Packing Rectangles
1995 Day 1 : Shopping Offers
1995 Day 1: Printing
1995 Day 2: Letter Game
1995 Day 2: Street Race
1995 Day 2: Wires and Switches
1995 Solution: Packing Rectangles
1995 Solution: Letter Game
1995 Solution: Street Race
1995 Solution: Wires and Switches

International Olympiad in Informatics (IOI) : 1996, Veszprém, Hungary

Year	Download
1996 Day 1 : A Game
1996 Day 1 : Job Processing
1996 Day 1 : Network of Schools
1996 Day 2 : Sorting a Three-Valued Sequence
1996 Day 2 : Longest Prefix
1996 Day 2 : Magic Squares
1996 Solutions to all problems

International Olympiad in Informatics (IOI) : 1997, Cape Town, South Africa

Year	Download
1997 Day 1 : Mars Explorer
1997 Day 1 : Game of Hex
1997 Day 1 : Toxic iShongololo
1997 Day 2 : Map Labelling
1997 Day 2 : Character Recognition
1997 Day 2 : Stacking Containers

International Olympiad in Informatics (IOI) : 1998, Setúbal, Portugal

Year	Download
1998 Day 1 : Contact
1998 Day 1 : Starry Night
1998 Day 1 : Party Lamps
1998 Day 2 : Picture
1998 Day 2 : Camelot
1998 Day 2 : Polygon

International Olympiad in Informatics (IOI) : 1999, Antalya-Belek, Turkey

Year	Download
1999 Day 1 : Little Shop of Flowers
1999 Day 1 : Hidden Codes
1999 Day 1 : Underground City
1999 Day 2 : Traffic Lights
1999 Day 2 : Flatten
1999 Day 2 : A Strip of Land

International Olympiad in Informatics (IOI) : 2000, Beijing, China

Year	Download
2000 Day 1 : Palindrome
2000 Day 1 : Car Parking
2000 Day 1 : Median Strength
2000 Day 2 : Walls
2000 Day 2 : Post Office
2000 Day 2 : Building with Blocks
2000 Solutions to all problems

International Olympiad in Informatics (IOI) : 2001, Tampere, Finland

Year	Download
2001 Dat 1 : Mobile Phones
2001 Dat 1 : Ioiwari Game
2001 Dat 1 : Twofive
2001 Dat 2 : Score
2001 Dat 2: Double Crypt
2001 Dat 2: Depot
2001 Solutions and handouts

International Olympiad in Informatics (IOI) : 2002, Yong-In, Korean Republic

Year	Download
2002 Day 1 : The Troublesome Frog
2002 Day 1 : Utopia Divided
2002 Day 1 : XOR
2002 Day 2 : Batch Scheduling
2002 Day 2 : Bus Terminals
2002 Day 2 : Two Rods

International Olympiad in Informatics (IOI) : 2003, Kenosha, Wisconsin, USA

Year	Download
2003 Day 1 : Trail Maintenance
2003 Day 1 : Comparing Code
2003 Day 1 : Reverse
2003 Day 2 : Guess Which Cow
2003 Day 2 : Amazing Robots
2003 Day 2 : Seeing the Boundary

International Olympiad in Informatics (IOI) : 2004, Athens, Greece

Year	Download
2004 Day 1 : Artemis
2004 Day 1 : Hermes
2004 Day 1 : Polygon
2004 Day 2 : Empodia
2004 Day 2 : Farmer
2004 Day 2 : Phidias

International Olympiad in Informatics (IOI) : 2005, Nowy Sacz, Poland 

Year	Download
2005 Day 1 : Garden
2005 Day 1 : Mean Sequence
2005 Day 1 : Mountain
2005 Day 2 : Birthday
2005 Day 2 : Rectangle Game
2005 Day 2 : Rivers
2005 Solutions and booklet

International Olympiad in Informatics (IOI) : 2006, Mérida, Yucatán, Mexico

Year	Download
2006 Day 1 : Forbidden Subgraph
2006 Day 1 : Pyramid
2006 Day 1 : Deciphering the Mayan Writing
2006 Day 2 : A Black Box Game
2006 Day 2 : The Valley of Mexico
2006 Day 2 : Joining Points

International Olympiad in Informatics (IOI) : 2007, Zagreb, Croatia

Year	Download
2007 Day 1 : Aliens
2007 Day 1 : Flood
2007 Day 1 : Sails
2007 Day 2 : Miners
2007 Day 2 : Pairs
2007 Day 2 : Trainings
2007 Solutions to all problems

International Olympiad in Informatics (IOI) : 2008, Cairo, Egypt

Year	Download
2008 Day 1 : Type Printer
2008 Day 1 : Islands
2008 Day 1 : Fish
2008 Day 2 : Linear Garden
2008 Day 2 : Pyramid Base
2008 Day 2 : Teleporters
2008 Solutions and booklet

International Olympiad in Informatics (IOI) : 2009, Plovdiv, Bulgaria

Year	Download
2009 Day 1 : Archery
2009 Day 1 : Hiring
2009 Day 1 : Poi
2009 Day 1 : Raisins
2009 Day 2 : Garage
2009 Day 2 : Mecho
2009 Day 2 : Regions
2009 Day 2 : Salesman
2009 Solutions and booklet

International Olympiad in Informatics (IOI) : 2010, Waterloo, Canada

Year	Download
2010 Day 1 : Cluedo
2010 Day 1 : Hotter Colder
2010 Day 1 : Quality of Living
2010 Day 1 : Language
2010 Day 2 : Memory
2010 Day 2 : Traffic
2010 Day 2 : Maze
2010 Day 2 : Save It
2010 Solutions to all problems

International Olympiad in Informatics (IOI) : 2011, Pattaya, Thailand

Year	Download
2011 Day 1 : Tropical Garden
2011 Day 1 : Race
2011 Day 1 : Ricehub
2011 Day 2 : Crocodile
2011 Day 2 : Elephants
2011 Day 2 : Parrots

International Olympiad in Informatics (IOI) : 2012, Sirmione – Montichiari, Italy

Year	Download
2012 Day 1 : Pebbling odometer
2012 Day 1 : Parachute rings
2012 Day 1 : Crayfish scrivener
2012 Day 2 : Ideal city
2012 Day 2 : Last supper
2012 Day 2 : Jousting tournament
2012 Solutions to all problems
2012 Practice problems

International Olympiad in Informatics (IOI) : 2013, Brisbane, Australia

Year	Download
2013 Day 1 : Dreaming
2013 Day 1 : Art Class
2013 Day 1 : Wombats
2013 Day 2 : Cave
2013 Day 2 : Robots
2013 Day 2 : Game
2013 Practice problems

International Olympiad in Informatics (IOI) : 2014, Taipei, Taiwan

Year	Download
2014 Day 1 : Rail
2014 Day 1 : Wall
2014 Day 1 : Game
2014 Day 2 : Gondola
2014 Day 2 : Friend
2014 Day 2 : Holiday

International Olympiad in Informatics (IOI) : 2015, Almaty, Kazakhstan

Year	Download
2015 Day 1 : Scales
2015 Day 1 : Teams
2015 Day 1 : Boxes
2015 Day 2 : Towns
2015 Day 2 : Sorting
2015 Day 2 : Horses

International Olympiad in Informatics (IOI) : 2016, Kazan, Russian Federation

Year	Download
2016 Day 1 : Detecting Molecules
2016 Day 1 : Roller Coaster Railroad
2016 Day 1 : Shortcut
2016 Day 2 : Paint By Numbers
2016 Day 2 : Unscrambling a Messy Bug
2016 Day 2 : Aliens
2016 Solutions to all problems

International Olympiad in Informatics (IOI) : 2017, Tehran, Iran

Year	Download
2017 Day 1 : Nowruz
2017 Day 1 : Wiring
2017 Day 1 : Toy Train
2017 Day 2 : The Big Prize
2017 Day 2 : Simurgh
2017 Day 2 : Ancient Books

International Olympiad in Informatics (IOI) : 2018, Tsukuba, Japan

Year	Download
2018 Day 1 : Combo
2018 Day 1 : Seats
2018 Day 1 : Werewolf
2018 Day 2 : Mechanical Doll
2018 Day 2 : Highway Tolls
2018 Day 2 : Meetings

International Olympiad in Informatics (IOI) : 2019, Baku, Azerbaijan

Year	Download
2019 Day 1 : Arranging Shoes
2019 Day 1 : Split the Attractions
2019 Day 1 : Rectangles
2019 Day 2 : Broken Line
2019 Day 2 : Vision Program
2019 Day 2 : Sky Walking

International Olympiad in Informatics (IOI) : 2020, Singapore, online

Year	Download
2020 Day 1 : Plants
2020 Day 1 : Super trees
2020 Day 1 : Tickets
2020 Day 2 : Biscuits
2020 Day 2 : Mushrooms
2020 Day 2 : Stations

International Olympiad in Informatics (IOI) : 2021, Singapore, online Held

Year	Download
2021 Day 1 : Candies
2021 Day 1 : Keys
2021 Day 1 : Parks
2021 Day 2 : DNA
2021 Day 2 : Dungeons
2021 Day 2 : Registers

International Olympiad in Informatics (IOI) : 2022, Indonesia

Year	Download
2022 Day 1 :
2022 Day 1 :
2022 Day 1 :
2022 Day 2 :
2022 Day 2 :
2022 Day 2 :