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Problem set. Hardest Problems


IDTitleSourceAuthorsDifficulty

1058ChocolateNEERC 2000 Central Subregional5252798

1074Very Short ProblemUSU Personal Contest 20016452108

1148Building TowersDSAP Vietnam Online Contest November 20012761741

1166Funny Card GameNEERC 2001 Northern Subregional1333567

1171Lost in SpaceRomanian Online Contest December 20013831269

1177Like ComparisonsUSU Personal Contest 20023931240

1199Mouse1303394

1216Two Pawns and One KingUSU Championship 20022322083

1239Ghost BustersNEERC 20021533097

1271Sailing DirectionsUSU Championship 20031014596

1312TrayUral Championship 2004. Round 11603017

1344Gigantic TurnipUSU Championship 20041064459

1369Cockroach RaceUral Championship 2005. Round 23112635

1374MisereUral Championship 2005. Round 13910600

1376Dean's Pyramid 2Ural Championship 2005. Round 1449618

1383Flower-garden DesignsPetrozavodsk Summer 2005. Moscow+Ural Contest429989

1384Goat in the Garden 4Petrozavodsk Summer 2005. Moscow+Ural Contest944995

1388PhotoPetrozavodsk Summer 2005. Moscow+Ural Contest2216233

1390Shots at WallsPetrozavodsk Summer 2005. Moscow+Ural Contest449619

1391SnakePetrozavodsk Summer 2005. Moscow+Ural Contest855468

1394Ships. Version 22315742

1395Pascal vs. C++. Version 22042334

1399Economical Director3410795

1415Mobile LifeUSU Championship 2005469247

1432Twofold LuckUSU Personal Contest 2006547901

1438Time Limit ExceededUSU Personal Contest 20061592992

1460WiresPetrozavodsk Winter 2006. USU Contest1064214

1464LightPetrozavodsk Winter 2006. USU Contest1582910

1478Spy SatellitesPetrozavodsk Summer 2006. Ural+Orel Contest1094073

1479Scheduled CheckingPetrozavodsk Summer 2006. Ural+Orel Contest974530

1524Men in BlackPetrozavodsk Winter 2007. D.Gozman Contest2613069

1536Delights of Pipe-weedUSU Personal Contest 2007557220

1548Sakura and StatisticsUral Championship 20072214521

1555Find the Treasure!Petrozavodsk Summer 2007. NSU Contest379583

1556Multishot in the Secret Cow LevelPetrozavodsk Summer 2007. NSU Contest389383

1589SokobanNEERC 2007 Eastern Subregional1915420

1594Aztec Treasure764612

1596Knight Mare239617

1618Arrays PrintingPetrozavodsk Winter 2008. ITMO Contest844479

1621Definite IntegralPetrozavodsk Winter 2008. ITMO Contest844479

1624Go out of here!Petrozavodsk Winter 2008. ITMO Contest725134

1626Interfering SegmentPetrozavodsk Winter 2008. ITMO Contest437943

1649Abstractionism to the PeopleNEERC 2008 Eastern Subregional516794

1653Death ConveyorNEERC 2008 Eastern Subregional526684

1660The Island of Bad LuckPetrozavodsk Winter 2008. USU Contest526617

1661DodecahedronPetrozavodsk Winter 2008. USU Contest983798

1662Goat in the Garden 6Petrozavodsk Winter 2008. USU Contest804558

1668Death Star 2Petrozavodsk Winter 2008. USU Contest605861

1672Droid fliesPetrozavodsk Summer 2008. USU Contest2611346

1674Drunk KingPetrozavodsk Summer 2008. USU Contest566189

1678Space Poker 3Petrozavodsk Summer 2008. USU Contest566189

1693Loyd's ProblemPetrozavodsk Winter 2009. USU Contest2710895

1695Work for RobotsPetrozavodsk Winter 2009. USU Contest1292900

1708Sum of Digits 2Ural Championship 20092511466

1714Mnemonics and Palindromes 2NEERC 2009 Eastern Subregional1113188

1763Expert FleaUral Championship 2010595375

1819Professional ApproachPetrozavodsk Summer 2010. Tavrida NU Contest387246

1840Victim of AdvertisingUral Championship 2011308523

1842Local RootsPetrozavodsk Summer 2010. USU Contest396740

1843Cutting a ParallelepipedPetrozavodsk Summer 2010. USU Contest694180

1848Fly HuntPetrozavodsk Summer 2010. USU Contest624587

1853Laser TechnologiesPetrozavodsk Summer 2011. Ural SU Team.GOV Contest337669

1906The Lost CivilizationUral Championship 2012297731

1952To Kill the DragonPetrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection1511363

1954Five PalindromesPetrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection633892

2016Magic and ScienceNEERC 2014 Eastern Subregional198653

2054AstronomyUral Championship 2015207912

2076VasianaQualification of Eastern Subregional 2015178085

2082PokerUral Championship 2016158447

2131Open CupLater is better than never155641

2137Dynamic string complexityLater is better than never136131