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Problem set. Hardest Problems


IDTitleSourceAuthorsDifficulty

1058ChocolateNEERC 2000 Central Subregional5272798

1074Very Short ProblemUSU Personal Contest 20016482105

1148Building TowersDSAP Vietnam Online Contest November 20012791729

1166Funny Card GameNEERC 2001 Northern Subregional1333579

1171Lost in SpaceRomanian Online Contest December 20013851266

1177Like ComparisonsUSU Personal Contest 20023931244

1199Mouse1303406

1216Two Pawns and One KingUSU Championship 20022332081

1239Ghost BustersNEERC 20021533108

1271Sailing DirectionsUSU Championship 20031014612

1312TrayUral Championship 2004. Round 11613009

1344Gigantic TurnipUSU Championship 20041064474

1369Cockroach RaceUral Championship 2005. Round 23112676

1374MisereUral Championship 2005. Round 13910633

1376Dean's Pyramid 2Ural Championship 2005. Round 1449649

1383Flower-garden DesignsPetrozavodsk Summer 2005. Moscow+Ural Contest439832

1384Goat in the Garden 4Petrozavodsk Summer 2005. Moscow+Ural Contest945011

1388PhotoPetrozavodsk Summer 2005. Moscow+Ural Contest2216285

1390Shots at WallsPetrozavodsk Summer 2005. Moscow+Ural Contest459475

1391SnakePetrozavodsk Summer 2005. Moscow+Ural Contest855485

1394Ships. Version 22315792

1395Pascal vs. C++. Version 22042342

1399Economical Director3610365

1415Mobile LifeUSU Championship 2005469276

1432Twofold LuckUSU Personal Contest 2006547928

1438Time Limit ExceededUSU Personal Contest 20061602985

1460WiresPetrozavodsk Winter 2006. USU Contest1064230

1464LightPetrozavodsk Winter 2006. USU Contest1592903

1478Spy SatellitesPetrozavodsk Summer 2006. Ural+Orel Contest1094088

1479Scheduled CheckingPetrozavodsk Summer 2006. Ural+Orel Contest984504

1524Men in BlackPetrozavodsk Winter 2007. D.Gozman Contest2613120

1536Delights of Pipe-weedUSU Personal Contest 2007557248

1548Sakura and StatisticsUral Championship 20072214579

1555Find the Treasure!Petrozavodsk Summer 2007. NSU Contest399230

1556Multishot in the Secret Cow LevelPetrozavodsk Summer 2007. NSU Contest389423

1589SokobanNEERC 2007 Eastern Subregional1915486

1594Aztec Treasure764636

1596Knight Mare239689

1618Arrays PrintingPetrozavodsk Winter 2008. ITMO Contest854453

1621Definite IntegralPetrozavodsk Winter 2008. ITMO Contest864406

1624Go out of here!Petrozavodsk Winter 2008. ITMO Contest725158

1626Interfering SegmentPetrozavodsk Winter 2008. ITMO Contest437981

1649Abstractionism to the PeopleNEERC 2008 Eastern Subregional516827

1653Death ConveyorNEERC 2008 Eastern Subregional536610

1660The Island of Bad LuckPetrozavodsk Winter 2008. USU Contest536544

1661DodecahedronPetrozavodsk Winter 2008. USU Contest993782

1662Goat in the Garden 6Petrozavodsk Winter 2008. USU Contest804581

1668Death Star 2Petrozavodsk Winter 2008. USU Contest605890

1672Droid fliesPetrozavodsk Summer 2008. USU Contest2611402

1674Drunk KingPetrozavodsk Summer 2008. USU Contest566219

1678Space Poker 3Petrozavodsk Summer 2008. USU Contest675331

1693Loyd's ProblemPetrozavodsk Winter 2009. USU Contest2810663

1695Work for RobotsPetrozavodsk Winter 2009. USU Contest1312874

1708Sum of Digits 2Ural Championship 20092511525

1714Mnemonics and Palindromes 2NEERC 2009 Eastern Subregional1113205

1763Expert FleaUral Championship 2010595407

1819Professional ApproachPetrozavodsk Summer 2010. Tavrida NU Contest387293

1840Victim of AdvertisingUral Championship 2011318370

1842Local RootsPetrozavodsk Summer 2010. USU Contest446158

1843Cutting a ParallelepipedPetrozavodsk Summer 2010. USU Contest694209

1848Fly HuntPetrozavodsk Summer 2010. USU Contest634556

1853Laser TechnologiesPetrozavodsk Summer 2011. Ural SU Team.GOV Contest347547

1906The Lost CivilizationUral Championship 2012297793

1952To Kill the DragonPetrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection1511461

1954Five PalindromesPetrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection653821

2016Magic and ScienceNEERC 2014 Eastern Subregional198742

2054AstronomyUral Championship 2015227499

2076VasianaQualification of Eastern Subregional 2015187893

2082PokerUral Championship 2016168227

2131Open CupLater is better than never155759

2137Dynamic string complexityLater is better than never136260