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Problem set. Hardest Problems


IDTitleSourceAuthorsDifficulty

1074Very Short ProblemUSU Personal Contest 20016322114

1058ChocolateNEERC 2000 Central Subregional5172792

1177Like ComparisonsUSU Personal Contest 20023861241

1171Lost in SpaceRomanian Online Contest December 20013731280

1148Building TowersDSAP Vietnam Online Contest November 20012731730

1216Two Pawns and One KingUSU Championship 20022302066

1395Pascal vs. C++. Version 22002339

1312TrayUral Championship 2004. Round 11592987

1464LightPetrozavodsk Winter 2006. USU Contest1552911

1438Time Limit ExceededUSU Personal Contest 20061543033

1239Ghost BustersNEERC 20021513084

1166Funny Card GameNEERC 2001 Northern Subregional1323535

1199Mouse1263429

1695Work for RobotsPetrozavodsk Winter 2009. USU Contest1252913

1478Spy SatellitesPetrozavodsk Summer 2006. Ural+Orel Contest1094001

1714Mnemonics and Palindromes 2NEERC 2009 Eastern Subregional1093155

1460WiresPetrozavodsk Winter 2006. USU Contest1044214

1344Gigantic TurnipUSU Championship 20041034507

1271Sailing DirectionsUSU Championship 2003974692

1661DodecahedronPetrozavodsk Winter 2008. USU Contest973742

1479Scheduled CheckingPetrozavodsk Summer 2006. Ural+Orel Contest954534

1384Goat in the Garden 4Petrozavodsk Summer 2005. Moscow+Ural Contest915064

1391SnakePetrozavodsk Summer 2005. Moscow+Ural Contest855384

1618Arrays PrintingPetrozavodsk Winter 2008. ITMO Contest844376

1621Definite IntegralPetrozavodsk Winter 2008. ITMO Contest794622

1662Goat in the Garden 6Petrozavodsk Winter 2008. USU Contest764656

1594Aztec Treasure714773

1624Go out of here!Petrozavodsk Winter 2008. ITMO Contest715079

1843Cutting a ParallelepipedPetrozavodsk Summer 2010. USU Contest684091

1954Five PalindromesPetrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection613834

1668Death Star 2Petrozavodsk Winter 2008. USU Contest595803

1763Expert FleaUral Championship 2010585300

1678Space Poker 3Petrozavodsk Summer 2008. USU Contest566040

1674Drunk KingPetrozavodsk Summer 2008. USU Contest556133

1536Delights of Pipe-weedUSU Personal Contest 2007537309

1432Twofold LuckUSU Personal Contest 2006528024

1848Fly HuntPetrozavodsk Summer 2010. USU Contest525147

1660The Island of Bad LuckPetrozavodsk Winter 2008. USU Contest516565

1653Death ConveyorNEERC 2008 Eastern Subregional506745

1649Abstractionism to the PeopleNEERC 2008 Eastern Subregional486978

1376Dean's Pyramid 2Ural Championship 2005. Round 1449470

1415Mobile LifeUSU Championship 2005449441

1390Shots at WallsPetrozavodsk Summer 2005. Moscow+Ural Contest439650

1383Flower-garden DesignsPetrozavodsk Summer 2005. Moscow+Ural Contest429836

1626Interfering SegmentPetrozavodsk Winter 2008. ITMO Contest418066

1374MisereUral Championship 2005. Round 13710881

1556Multishot in the Secret Cow LevelPetrozavodsk Summer 2007. NSU Contest379388

1842Local RootsPetrozavodsk Summer 2010. USU Contest376790

1555Find the Treasure!Petrozavodsk Summer 2007. NSU Contest369592

1819Professional ApproachPetrozavodsk Summer 2010. Tavrida NU Contest367326

1399Economical Director3310843

1853Laser TechnologiesPetrozavodsk Summer 2011. Ural SU Team.GOV Contest327587

1840Victim of AdvertisingUral Championship 2011288683

1906The Lost CivilizationUral Championship 2012287629

1369Cockroach RaceUral Championship 2005. Round 22713785

1672Droid fliesPetrozavodsk Summer 2008. USU Contest2611072

1693Loyd's ProblemPetrozavodsk Winter 2009. USU Contest2511234

1524Men in BlackPetrozavodsk Winter 2007. D.Gozman Contest2413579

1708Sum of Digits 2Ural Championship 20092411510

1596Knight Mare239273

1388PhotoPetrozavodsk Summer 2005. Moscow+Ural Contest2116499

1548Sakura and StatisticsUral Championship 20071915716

2054AstronomyUral Championship 2015197747

2016Magic and ScienceNEERC 2014 Eastern Subregional188517

1394Ships. Version 21718944

2076VasianaQualification of Eastern Subregional 2015167896

2082PokerUral Championship 2016157922

1589SokobanNEERC 2007 Eastern Subregional1418250

1952To Kill the DragonPetrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection1311833

2131Open CupLater is better than never106337

2137Dynamic string complexityLater is better than never96670