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Problem set. Hardest Problems


IDTitleSourceAuthorsDifficulty

1074Very Short ProblemUSU Personal Contest 20016322109

1058ChocolateNEERC 2000 Central Subregional5182780

1177Like ComparisonsUSU Personal Contest 20023861238

1171Lost in SpaceRomanian Online Contest December 20013741274

1148Building TowersDSAP Vietnam Online Contest November 20012741721

1216Two Pawns and One KingUSU Championship 20022312053

1395Pascal vs. C++. Version 21992345

1312TrayUral Championship 2004. Round 11592981

1464LightPetrozavodsk Winter 2006. USU Contest1562888

1438Time Limit ExceededUSU Personal Contest 20061533046

1239Ghost BustersNEERC 20021523059

1166Funny Card GameNEERC 2001 Northern Subregional1333503

1199Mouse1273396

1695Work for RobotsPetrozavodsk Winter 2009. USU Contest1262882

1714Mnemonics and Palindromes 2NEERC 2009 Eastern Subregional1103118

1478Spy SatellitesPetrozavodsk Summer 2006. Ural+Orel Contest1093992

1460WiresPetrozavodsk Winter 2006. USU Contest1054168

1344Gigantic TurnipUSU Championship 20041034498

1271Sailing DirectionsUSU Championship 2003974683

1661DodecahedronPetrozavodsk Winter 2008. USU Contest973731

1479Scheduled CheckingPetrozavodsk Summer 2006. Ural+Orel Contest954524

1384Goat in the Garden 4Petrozavodsk Summer 2005. Moscow+Ural Contest915054

1391SnakePetrozavodsk Summer 2005. Moscow+Ural Contest865317

1618Arrays PrintingPetrozavodsk Winter 2008. ITMO Contest844364

1621Definite IntegralPetrozavodsk Winter 2008. ITMO Contest804558

1662Goat in the Garden 6Petrozavodsk Winter 2008. USU Contest764642

1594Aztec Treasure724700

1624Go out of here!Petrozavodsk Winter 2008. ITMO Contest715064

1843Cutting a ParallelepipedPetrozavodsk Summer 2010. USU Contest694022

1954Five PalindromesPetrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection613813

1668Death Star 2Petrozavodsk Winter 2008. USU Contest595786

1763Expert FleaUral Championship 2010595205

1678Space Poker 3Petrozavodsk Summer 2008. USU Contest566021

1674Drunk KingPetrozavodsk Summer 2008. USU Contest556114

1536Delights of Pipe-weedUSU Personal Contest 2007547178

1432Twofold LuckUSU Personal Contest 2006537880

1848Fly HuntPetrozavodsk Summer 2010. USU Contest535043

1660The Island of Bad LuckPetrozavodsk Winter 2008. USU Contest516545

1653Death ConveyorNEERC 2008 Eastern Subregional506725

1649Abstractionism to the PeopleNEERC 2008 Eastern Subregional486957

1415Mobile LifeUSU Championship 2005459251

1376Dean's Pyramid 2Ural Championship 2005. Round 1439630

1390Shots at WallsPetrozavodsk Summer 2005. Moscow+Ural Contest439632

1383Flower-garden DesignsPetrozavodsk Summer 2005. Moscow+Ural Contest429817

1626Interfering SegmentPetrozavodsk Winter 2008. ITMO Contest418043

1842Local RootsPetrozavodsk Summer 2010. USU Contest386619

1374MisereUral Championship 2005. Round 13710860

1556Multishot in the Secret Cow LevelPetrozavodsk Summer 2007. NSU Contest379364

1819Professional ApproachPetrozavodsk Summer 2010. Tavrida NU Contest377141

1555Find the Treasure!Petrozavodsk Summer 2007. NSU Contest369568

1399Economical Director3410572

1853Laser TechnologiesPetrozavodsk Summer 2011. Ural SU Team.GOV Contest337378

1840Victim of AdvertisingUral Championship 2011298426

1906The Lost CivilizationUral Championship 2012297396

1369Cockroach RaceUral Championship 2005. Round 22813396

1672Droid fliesPetrozavodsk Summer 2008. USU Contest2611039

1524Men in BlackPetrozavodsk Winter 2007. D.Gozman Contest2513160

1693Loyd's ProblemPetrozavodsk Winter 2009. USU Contest2511199

1708Sum of Digits 2Ural Championship 20092411474

1596Knight Mare239231

1388PhotoPetrozavodsk Summer 2005. Moscow+Ural Contest2116467

2054AstronomyUral Championship 2015207437

2016Magic and ScienceNEERC 2014 Eastern Subregional188462

1394Ships. Version 21718907

1548Sakura and StatisticsUral Championship 20071716840

2076VasianaQualification of Eastern Subregional 2015167834

2082PokerUral Championship 2016157857

1589SokobanNEERC 2007 Eastern Subregional1418203

1952To Kill the DragonPetrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection1311769

2131Open CupLater is better than never106248

2137Dynamic string complexityLater is better than never96577