IOI 2017

Welcome to the IOI online practice page.

We plan to start IOI 2017 online mirror round exactly one hour after the start of official contest.

Contest links will be available here.

Day 1

Day 2

IOI archive, problems starting from IOI 2003

It is still work in progress

2003 maintain, code, reverse, guess, robots, boundary

2004 artemis, hermes, polygon, empodia, farmer, phidias

2005 garden, mean, mountains, birthday, game, rivers

2006 writing, pyramid, forbidden, mexico, points, blackbox

2007 aliens, flood, sails, miners, pairs, trainings

2008 printer, islands, fish, linear, pyramid, teleport

2009 archery, hiring, poi, raisins, garage, mecho, regions, salesman 2009 Day 1, 2009 Day 2

2010 cluedo, hottercolder, quality, lang, memory, traffic, maze, saveit 2010 Day 1, 2010 Day 2

2011 garden, race, ricehub, crocodile, elephants, parrots 2011 Day 1, 2011 Day 2

2012 odometr1, odometr2, odometr3, odometr4, odometr5, rings, scrivener, city, supper, tournament

2013 dreaming, artclass, wombats, cave, robots, game

2014 rail, wall, game, gondola, friend, holiday

2015 boxes, scales, teams, horses, sorting, towns 2015 Day 1, 2015 Day 2

2016 molecules, railroad, shortcut, paint, messy, aliens, 2016 Day 1 2016 Day 2