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Problem set. Hardest Problems


IDTitleSourceAuthorsDifficulty

1171Lost in SpaceRomanian Online Contest December 20013241297

1177Like ComparisonsUSU Personal Contest 20023211313

1148Building TowersDSAP Vietnam Online Contest November 20012361759

1216Two Pawns and One KingUSU Championship 20022082016

1074Very Short ProblemUSU Personal Contest 20015712058

1395Pascal vs. C++. Version 21572600

1714Mnemonics and Palindromes 2NEERC 2009 Eastern Subregional992804

1312TrayUral Championship 2004. Round 11472863

1695Work for RobotsPetrozavodsk Winter 2009. USU Contest1032879

1058ChocolateNEERC 2000 Central Subregional4362904

1239Ghost BustersNEERC 20021412916

1464LightPetrozavodsk Winter 2006. USU Contest1342933

1438Time Limit ExceededUSU Personal Contest 20061333086

1843Cutting a ParallelepipedPetrozavodsk Summer 2010. USU Contest613422

1166Funny Card GameNEERC 2001 Northern Subregional1163542

1199Mouse1033599

1954Five PalindromesPetrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection423670

1478Spy SatellitesPetrozavodsk Summer 2006. Ural+Orel Contest993831

1460WiresPetrozavodsk Winter 2006. USU Contest944061

1661DodecahedronPetrozavodsk Winter 2008. USU Contest704168

1662Goat in the Garden 6Petrozavodsk Winter 2008. USU Contest664387

1344Gigantic TurnipUSU Championship 2004914499

1621Definite IntegralPetrozavodsk Winter 2008. ITMO Contest644670

1271Sailing DirectionsUSU Championship 2003854699

1594Aztec Treasure574747

1618Arrays PrintingPetrozavodsk Winter 2008. ITMO Contest604937

1391SnakePetrozavodsk Summer 2005. Moscow+Ural Contest785191

1384Goat in the Garden 4Petrozavodsk Summer 2005. Moscow+Ural Contest765312

1848Fly HuntPetrozavodsk Summer 2010. USU Contest355400

1479Scheduled CheckingPetrozavodsk Summer 2006. Ural+Orel Contest675422

1763Expert FleaUral Championship 2010425557

1674Drunk KingPetrozavodsk Summer 2008. USU Contest456025

1668Death Star 2Petrozavodsk Winter 2008. USU Contest456062

1842Local RootsPetrozavodsk Summer 2010. USU Contest306075

2016Magic and ScienceNEERC 2014 Eastern Subregional156134

1660The Island of Bad LuckPetrozavodsk Winter 2008. USU Contest436291

1853Laser TechnologiesPetrozavodsk Summer 2011. Ural SU Team.GOV Contest286381

1624Go out of here!Petrozavodsk Winter 2008. ITMO Contest446399

1819Professional ApproachPetrozavodsk Summer 2010. Tavrida NU Contest316411

2076VasianaQualification of Eastern Subregional 201586470

1906The Lost CivilizationUral Championship 2012226579

2082PokerUral Championship 201666776

1536Delights of Pipe-weedUSU Personal Contest 2007496782

1649Abstractionism to the PeopleNEERC 2008 Eastern Subregional396901

1653Death ConveyorNEERC 2008 Eastern Subregional387045

1626Interfering SegmentPetrozavodsk Winter 2008. ITMO Contest367512

1840Victim of AdvertisingUral Championship 2011227971

1432Twofold LuckUSU Personal Contest 2006448172

1678Space Poker 3Petrozavodsk Summer 2008. USU Contest308285

1556Multishot in the Secret Cow LevelPetrozavodsk Summer 2007. NSU Contest329019

1415Mobile LifeUSU Championship 2005399286

1376Dean's Pyramid 2Ural Championship 2005. Round 1389516

1952To Kill the DragonPetrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection109540

1390Shots at WallsPetrozavodsk Summer 2005. Moscow+Ural Contest379720

1693Loyd's ProblemPetrozavodsk Winter 2009. USU Contest2110496

1672Droid fliesPetrozavodsk Summer 2008. USU Contest2110690

1399Economical Director2710989

1555Find the Treasure!Petrozavodsk Summer 2007. NSU Contest2311479

1374MisereUral Championship 2005. Round 12911712

1708Sum of Digits 2Ural Championship 20091612435

1524Men in BlackPetrozavodsk Winter 2007. D.Gozman Contest2212547

1383Flower-garden DesignsPetrozavodsk Summer 2005. Moscow+Ural Contest2313844

1548Sakura and StatisticsUral Championship 20071814105

1369Cockroach RaceUral Championship 2005. Round 22214227

1388PhotoPetrozavodsk Summer 2005. Moscow+Ural Contest1816316

1589SokobanNEERC 2007 Eastern Subregional820843

1394Ships. Version 2726875