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Problem set. Hardest Problems


IDTitleSourceAuthorsDifficulty

1058ChocolateNEERC 2000 Central Subregional5222796

1074Very Short ProblemUSU Personal Contest 20016382117

1148Building TowersDSAP Vietnam Online Contest November 20012761730

1166Funny Card GameNEERC 2001 Northern Subregional1323570

1171Lost in SpaceRomanian Online Contest December 20013791274

1177Like ComparisonsUSU Personal Contest 20023891244

1199Mouse1293394

1216Two Pawns and One KingUSU Championship 20022312079

1239Ghost BustersNEERC 20021523097

1271Sailing DirectionsUSU Championship 20031004610

1312TrayUral Championship 2004. Round 11593017

1344Gigantic TurnipUSU Championship 20041044511

1369Cockroach RaceUral Championship 2005. Round 22913206

1374MisereUral Championship 2005. Round 13710987

1376Dean's Pyramid 2Ural Championship 2005. Round 1449562

1383Flower-garden DesignsPetrozavodsk Summer 2005. Moscow+Ural Contest429932

1384Goat in the Garden 4Petrozavodsk Summer 2005. Moscow+Ural Contest925063

1388PhotoPetrozavodsk Summer 2005. Moscow+Ural Contest2216139

1390Shots at WallsPetrozavodsk Summer 2005. Moscow+Ural Contest439744

1391SnakePetrozavodsk Summer 2005. Moscow+Ural Contest855436

1394Ships. Version 22315650

1395Pascal vs. C++. Version 22022341

1399Economical Director3410721

1415Mobile LifeUSU Championship 2005469193

1432Twofold LuckUSU Personal Contest 2006547853

1438Time Limit ExceededUSU Personal Contest 20061553046

1460WiresPetrozavodsk Winter 2006. USU Contest1054223

1464LightPetrozavodsk Winter 2006. USU Contest1562926

1478Spy SatellitesPetrozavodsk Summer 2006. Ural+Orel Contest1094046

1479Scheduled CheckingPetrozavodsk Summer 2006. Ural+Orel Contest974499

1524Men in BlackPetrozavodsk Winter 2007. D.Gozman Contest2612977

1536Delights of Pipe-weedUSU Personal Contest 2007557169

1548Sakura and StatisticsUral Championship 20072114881

1555Find the Treasure!Petrozavodsk Summer 2007. NSU Contest379509

1556Multishot in the Secret Cow LevelPetrozavodsk Summer 2007. NSU Contest389311

1589SokobanNEERC 2007 Eastern Subregional1915301

1594Aztec Treasure734733

1596Knight Mare239488

1618Arrays PrintingPetrozavodsk Winter 2008. ITMO Contest844440

1621Definite IntegralPetrozavodsk Winter 2008. ITMO Contest824537

1624Go out of here!Petrozavodsk Winter 2008. ITMO Contest715153

1626Interfering SegmentPetrozavodsk Winter 2008. ITMO Contest418184

1649Abstractionism to the PeopleNEERC 2008 Eastern Subregional487082

1653Death ConveyorNEERC 2008 Eastern Subregional516734

1660The Island of Bad LuckPetrozavodsk Winter 2008. USU Contest526557

1661DodecahedronPetrozavodsk Winter 2008. USU Contest973799

1662Goat in the Garden 6Petrozavodsk Winter 2008. USU Contest784620

1668Death Star 2Petrozavodsk Winter 2008. USU Contest595892

1672Droid fliesPetrozavodsk Summer 2008. USU Contest2611243

1674Drunk KingPetrozavodsk Summer 2008. USU Contest566132

1678Space Poker 3Petrozavodsk Summer 2008. USU Contest566132

1693Loyd's ProblemPetrozavodsk Winter 2009. USU Contest2710794

1695Work for RobotsPetrozavodsk Winter 2009. USU Contest1282894

1708Sum of Digits 2Ural Championship 20092511359

1714Mnemonics and Palindromes 2NEERC 2009 Eastern Subregional1093209

1763Expert FleaUral Championship 2010595318

1819Professional ApproachPetrozavodsk Summer 2010. Tavrida NU Contest377313

1840Victim of AdvertisingUral Championship 2011308420

1842Local RootsPetrozavodsk Summer 2010. USU Contest396654

1843Cutting a ParallelepipedPetrozavodsk Summer 2010. USU Contest694127

1848Fly HuntPetrozavodsk Summer 2010. USU Contest604658

1853Laser TechnologiesPetrozavodsk Summer 2011. Ural SU Team.GOV Contest337572

1906The Lost CivilizationUral Championship 2012297619

1952To Kill the DragonPetrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection1511183

1954Five PalindromesPetrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection613938

2016Magic and ScienceNEERC 2014 Eastern Subregional198491

2054AstronomyUral Championship 2015207752

2076VasianaQualification of Eastern Subregional 2015177904

2082PokerUral Championship 2016158249

2131Open CupLater is better than never155425

2137Dynamic string complexityLater is better than never135897