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Problem set. Hardest Problems


IDTitleSourceAuthorsDifficulty

1177Like ComparisonsUSU Personal Contest 20023861241

1171Lost in SpaceRomanian Online Contest December 20013741276

1148Building TowersDSAP Vietnam Online Contest November 20012741724

1216Two Pawns and One KingUSU Championship 20022312057

1074Very Short ProblemUSU Personal Contest 20016332110

1395Pascal vs. C++. Version 22012327

1058ChocolateNEERC 2000 Central Subregional5182786

1695Work for RobotsPetrozavodsk Winter 2009. USU Contest1262891

1464LightPetrozavodsk Winter 2006. USU Contest1562894

1312TrayUral Championship 2004. Round 11602969

1438Time Limit ExceededUSU Personal Contest 20061553015

1239Ghost BustersNEERC 20021523065

1714Mnemonics and Palindromes 2NEERC 2009 Eastern Subregional1103128

1199Mouse1273404

1166Funny Card GameNEERC 2001 Northern Subregional1333510

1661DodecahedronPetrozavodsk Winter 2008. USU Contest983707

1954Five PalindromesPetrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection623779

1478Spy SatellitesPetrozavodsk Summer 2006. Ural+Orel Contest1103967

1843Cutting a ParallelepipedPetrozavodsk Summer 2010. USU Contest694038

1460WiresPetrozavodsk Winter 2006. USU Contest1054177

1618Arrays PrintingPetrozavodsk Winter 2008. ITMO Contest854330

1344Gigantic TurnipUSU Championship 20041044467

1479Scheduled CheckingPetrozavodsk Summer 2006. Ural+Orel Contest964491

1621Definite IntegralPetrozavodsk Winter 2008. ITMO Contest804570

1662Goat in the Garden 6Petrozavodsk Winter 2008. USU Contest774602

1271Sailing DirectionsUSU Championship 2003984648

1594Aztec Treasure724714

1384Goat in the Garden 4Petrozavodsk Summer 2005. Moscow+Ural Contest925014

1624Go out of here!Petrozavodsk Winter 2008. ITMO Contest725016

1848Fly HuntPetrozavodsk Summer 2010. USU Contest535064

1763Expert FleaUral Championship 2010595223

1391SnakePetrozavodsk Summer 2005. Moscow+Ural Contest865327

1668Death Star 2Petrozavodsk Winter 2008. USU Contest605720

1678Space Poker 3Petrozavodsk Summer 2008. USU Contest575949

1674Drunk KingPetrozavodsk Summer 2008. USU Contest566039

2131Open CupLater is better than never106333

1660The Island of Bad LuckPetrozavodsk Winter 2008. USU Contest526458

1653Death ConveyorNEERC 2008 Eastern Subregional516633

1842Local RootsPetrozavodsk Summer 2010. USU Contest386647

2137Dynamic string complexityLater is better than never96665

1649Abstractionism to the PeopleNEERC 2008 Eastern Subregional496858

1819Professional ApproachPetrozavodsk Summer 2010. Tavrida NU Contest377168

1536Delights of Pipe-weedUSU Personal Contest 2007547194

1853Laser TechnologiesPetrozavodsk Summer 2011. Ural SU Team.GOV Contest337409

1906The Lost CivilizationUral Championship 2012297431

2054AstronomyUral Championship 2015207487

2082PokerUral Championship 2016167615

2076VasianaQualification of Eastern Subregional 2015167893

1432Twofold LuckUSU Personal Contest 2006537896

1626Interfering SegmentPetrozavodsk Winter 2008. ITMO Contest427910

1840Victim of AdvertisingUral Championship 2011298459

2016Magic and ScienceNEERC 2014 Eastern Subregional188515

1596Knight Mare248999

1556Multishot in the Secret Cow LevelPetrozavodsk Summer 2007. NSU Contest389192

1415Mobile LifeUSU Championship 2005459268

1555Find the Treasure!Petrozavodsk Summer 2007. NSU Contest379387

1376Dean's Pyramid 2Ural Championship 2005. Round 1449469

1390Shots at WallsPetrozavodsk Summer 2005. Moscow+Ural Contest449471

1383Flower-garden DesignsPetrozavodsk Summer 2005. Moscow+Ural Contest439649

1399Economical Director3410596

1374MisereUral Championship 2005. Round 13810653

1672Droid fliesPetrozavodsk Summer 2008. USU Contest2710772

1693Loyd's ProblemPetrozavodsk Winter 2009. USU Contest2610921

1708Sum of Digits 2Ural Championship 20092511180

1952To Kill the DragonPetrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection1311830

1524Men in BlackPetrozavodsk Winter 2007. D.Gozman Contest2513190

1369Cockroach RaceUral Championship 2005. Round 22813421

1548Sakura and StatisticsUral Championship 20071915714

1388PhotoPetrozavodsk Summer 2005. Moscow+Ural Contest2116497

1589SokobanNEERC 2007 Eastern Subregional1418248

1394Ships. Version 21718942