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Problem set. Hardest Problems


IDTitleSourceAuthorsDifficulty

1074Very Short ProblemUSU Personal Contest 20015762071

1058ChocolateNEERC 2000 Central Subregional4432902

1171Lost in SpaceRomanian Online Contest December 20013271304

1177Like ComparisonsUSU Personal Contest 20023231324

1148Building TowersDSAP Vietnam Online Contest November 20012411749

1216Two Pawns and One KingUSU Championship 20022102026

1395Pascal vs. C++. Version 21582622

1312TrayUral Championship 2004. Round 11482883

1239Ghost BustersNEERC 20021422937

1464LightPetrozavodsk Winter 2006. USU Contest1402858

1438Time Limit ExceededUSU Personal Contest 20061353086

1166Funny Card GameNEERC 2001 Northern Subregional1173562

1695Work for RobotsPetrozavodsk Winter 2009. USU Contest1042919

1199Mouse1033657

1714Mnemonics and Palindromes 2NEERC 2009 Eastern Subregional1012823

1478Spy SatellitesPetrozavodsk Summer 2006. Ural+Orel Contest993890

1460WiresPetrozavodsk Winter 2006. USU Contest944122

1344Gigantic TurnipUSU Championship 2004924514

1271Sailing DirectionsUSU Championship 2003854763

1391SnakePetrozavodsk Summer 2005. Moscow+Ural Contest795201

1384Goat in the Garden 4Petrozavodsk Summer 2005. Moscow+Ural Contest775320

1661DodecahedronPetrozavodsk Winter 2008. USU Contest724156

1479Scheduled CheckingPetrozavodsk Summer 2006. Ural+Orel Contest695367

1662Goat in the Garden 6Petrozavodsk Winter 2008. USU Contest664484

1621Definite IntegralPetrozavodsk Winter 2008. ITMO Contest644768

1843Cutting a ParallelepipedPetrozavodsk Summer 2010. USU Contest613540

1618Arrays PrintingPetrozavodsk Winter 2008. ITMO Contest605040

1594Aztec Treasure594718

1536Delights of Pipe-weedUSU Personal Contest 2007506780

1674Drunk KingPetrozavodsk Summer 2008. USU Contest485841

1668Death Star 2Petrozavodsk Winter 2008. USU Contest466085

1954Five PalindromesPetrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection463567

1624Go out of here!Petrozavodsk Winter 2008. ITMO Contest456414

1432Twofold LuckUSU Personal Contest 2006448286

1660The Island of Bad LuckPetrozavodsk Winter 2008. USU Contest436430

1763Expert FleaUral Championship 2010435600

1649Abstractionism to the PeopleNEERC 2008 Eastern Subregional406909

1653Death ConveyorNEERC 2008 Eastern Subregional406909

1415Mobile LifeUSU Championship 2005399408

1376Dean's Pyramid 2Ural Championship 2005. Round 1389641

1390Shots at WallsPetrozavodsk Summer 2005. Moscow+Ural Contest379848

1626Interfering SegmentPetrozavodsk Winter 2008. ITMO Contest377506

1848Fly HuntPetrozavodsk Summer 2010. USU Contest355586

1819Professional ApproachPetrozavodsk Summer 2010. Tavrida NU Contest336302

1842Local RootsPetrozavodsk Summer 2010. USU Contest335846

1556Multishot in the Secret Cow LevelPetrozavodsk Summer 2007. NSU Contest329182

1678Space Poker 3Petrozavodsk Summer 2008. USU Contest308469

1374MisereUral Championship 2005. Round 12911866

1853Laser TechnologiesPetrozavodsk Summer 2011. Ural SU Team.GOV Contest296432

1399Economical Director2810872

1906The Lost CivilizationUral Championship 2012246448

1383Flower-garden DesignsPetrozavodsk Summer 2005. Moscow+Ural Contest2314026

1555Find the Treasure!Petrozavodsk Summer 2007. NSU Contest2311686

1369Cockroach RaceUral Championship 2005. Round 22214415

1524Men in BlackPetrozavodsk Winter 2007. D.Gozman Contest2212754

1840Victim of AdvertisingUral Championship 2011228228

1672Droid fliesPetrozavodsk Summer 2008. USU Contest2110928

1693Loyd's ProblemPetrozavodsk Winter 2009. USU Contest2110736

1548Sakura and StatisticsUral Championship 20071913849

1388PhotoPetrozavodsk Summer 2005. Moscow+Ural Contest1816530

1708Sum of Digits 2Ural Championship 20091612722

2016Magic and ScienceNEERC 2014 Eastern Subregional166258

1952To Kill the DragonPetrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection109987

2076VasianaQualification of Eastern Subregional 2015106311

1394Ships. Version 2825715

1589SokobanNEERC 2007 Eastern Subregional821226

2082PokerUral Championship 201667391