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Problem set. Hardest Problems


IDTitleSourceAuthorsDifficulty

1171Lost in SpaceRomanian Online Contest December 20013201295

1177Like ComparisonsUSU Personal Contest 20023201299

1148Building TowersDSAP Vietnam Online Contest November 20012321764

1216Two Pawns and One KingUSU Championship 20022062008

1074Very Short ProblemUSU Personal Contest 20015582076

1395Pascal vs. C++. Version 21552597

1714Mnemonics and Palindromes 2NEERC 2009 Eastern Subregional992739

1695Work for RobotsPetrozavodsk Winter 2009. USU Contest1022843

1312TrayUral Championship 2004. Round 11462845

1239Ghost BustersNEERC 20021412878

1058ChocolateNEERC 2000 Central Subregional4332883

1464LightPetrozavodsk Winter 2006. USU Contest1342892

1438Time Limit ExceededUSU Personal Contest 20061323067

1843Cutting a ParallelepipedPetrozavodsk Summer 2010. USU Contest613313

1166Funny Card GameNEERC 2001 Northern Subregional1163497

1199Mouse1033545

1954Five PalindromesPetrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection393726

1478Spy SatellitesPetrozavodsk Summer 2006. Ural+Orel Contest973847

1460WiresPetrozavodsk Winter 2006. USU Contest944004

1661DodecahedronPetrozavodsk Winter 2008. USU Contest694134

1662Goat in the Garden 6Petrozavodsk Winter 2008. USU Contest654355

1344Gigantic TurnipUSU Championship 2004914444

1621Definite IntegralPetrozavodsk Winter 2008. ITMO Contest644579

1271Sailing DirectionsUSU Championship 2003854639

1594Aztec Treasure564713

1618Arrays PrintingPetrozavodsk Winter 2008. ITMO Contest594911

1391SnakePetrozavodsk Summer 2005. Moscow+Ural Contest775187

1384Goat in the Garden 4Petrozavodsk Summer 2005. Moscow+Ural Contest755309

1479Scheduled CheckingPetrozavodsk Summer 2006. Ural+Orel Contest665415

1763Expert FleaUral Championship 2010425417

1848Fly HuntPetrozavodsk Summer 2010. USU Contest325601

2016Magic and ScienceNEERC 2014 Eastern Subregional155788

2076VasianaQualification of eastern subregional contest 201585968

1842Local RootsPetrozavodsk Summer 2010. USU Contest296032

1668Death Star 2Petrozavodsk Winter 2008. USU Contest446048

2082PokerUral Championship 201666206

1624Go out of here!Petrozavodsk Winter 2008. ITMO Contest446275

1660The Island of Bad LuckPetrozavodsk Winter 2008. USU Contest426281

1853Laser TechnologiesPetrozavodsk Summer 2011. Ural SU Team.GOV Contest276344

1674Drunk KingPetrozavodsk Summer 2008. USU Contest416364

1819Professional ApproachPetrozavodsk Summer 2010. Tavrida NU Contest306383

1536Delights of Pipe-weedUSU Personal Contest 2007496678

1906The Lost CivilizationUral Championship 2012206748

1649Abstractionism to the PeopleNEERC 2008 Eastern Subregional396763

1653Death ConveyorNEERC 2008 Eastern Subregional386904

1626Interfering SegmentPetrozavodsk Winter 2008. ITMO Contest357531

1840Victim of AdvertisingUral Championship 2011217982

1432Twofold LuckUSU Personal Contest 2006448066

1678Space Poker 3Petrozavodsk Summer 2008. USU Contest298322

1556Multishot in the Secret Cow LevelPetrozavodsk Summer 2007. NSU Contest328868

1415Mobile LifeUSU Championship 2005399172

1376Dean's Pyramid 2Ural Championship 2005. Round 1389400

1390Shots at WallsPetrozavodsk Summer 2005. Moscow+Ural Contest379602

1952To Kill the DragonPetrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection99606

1672Droid fliesPetrozavodsk Summer 2008. USU Contest2110469

1693Loyd's ProblemPetrozavodsk Winter 2009. USU Contest2010615

1399Economical Director2710825

1374MisereUral Championship 2005. Round 12911569

1555Find the Treasure!Petrozavodsk Summer 2007. NSU Contest2211639

1708Sum of Digits 2Ural Championship 20091612169

1524Men in BlackPetrozavodsk Winter 2007. D.Gozman Contest2212356

1383Flower-garden DesignsPetrozavodsk Summer 2005. Moscow+Ural Contest2313675

1548Sakura and StatisticsUral Championship 20071813884

1369Cockroach RaceUral Championship 2005. Round 22114506

1388PhotoPetrozavodsk Summer 2005. Moscow+Ural Contest1816118

1589SokobanNEERC 2007 Eastern Subregional721693

1394Ships. Version 2726548