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Problem set. Hardest Problems


IDTitleSourceAuthorsDifficulty

1171Lost in SpaceRomanian Online Contest December 20013301306

1177Like ComparisonsUSU Personal Contest 20023271322

1148Building TowersDSAP Vietnam Online Contest November 20012421760

1216Two Pawns and One KingUSU Championship 20022122028

1074Very Short ProblemUSU Personal Contest 20015912041

1395Pascal vs. C++. Version 21592634

1714Mnemonics and Palindromes 2NEERC 2009 Eastern Subregional1032823

1464LightPetrozavodsk Winter 2006. USU Contest1432833

1312TrayUral Championship 2004. Round 11512857

1058ChocolateNEERC 2000 Central Subregional4522877

1695Work for RobotsPetrozavodsk Winter 2009. USU Contest1062917

1239Ghost BustersNEERC 20021432948

1438Time Limit ExceededUSU Personal Contest 20061373075

1954Five PalindromesPetrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection513384

1843Cutting a ParallelepipedPetrozavodsk Summer 2010. USU Contest643481

1166Funny Card GameNEERC 2001 Northern Subregional1183570

1199Mouse1033700

1478Spy SatellitesPetrozavodsk Summer 2006. Ural+Orel Contest1003898

1460WiresPetrozavodsk Winter 2006. USU Contest954128

1661DodecahedronPetrozavodsk Winter 2008. USU Contest734172

1344Gigantic TurnipUSU Championship 2004934514

1662Goat in the Garden 6Petrozavodsk Winter 2008. USU Contest664556

1621Definite IntegralPetrozavodsk Winter 2008. ITMO Contest674652

1271Sailing DirectionsUSU Championship 2003874712

1594Aztec Treasure594800

1618Arrays PrintingPetrozavodsk Winter 2008. ITMO Contest605117

1391SnakePetrozavodsk Summer 2005. Moscow+Ural Contest795251

1384Goat in the Garden 4Petrozavodsk Summer 2005. Moscow+Ural Contest785310

1479Scheduled CheckingPetrozavodsk Summer 2006. Ural+Orel Contest705359

1763Expert FleaUral Championship 2010455503

1848Fly HuntPetrozavodsk Summer 2010. USU Contest355724

1674Drunk KingPetrozavodsk Summer 2008. USU Contest485936

1842Local RootsPetrozavodsk Summer 2010. USU Contest335991

1668Death Star 2Petrozavodsk Winter 2008. USU Contest466183

2054AstronomyUral Championship 2015156185

2082PokerUral Championship 2016106280

1819Professional ApproachPetrozavodsk Summer 2010. Tavrida NU Contest346297

1660The Island of Bad LuckPetrozavodsk Winter 2008. USU Contest446412

1624Go out of here!Petrozavodsk Winter 2008. ITMO Contest456512

2016Magic and ScienceNEERC 2014 Eastern Subregional166526

1853Laser TechnologiesPetrozavodsk Summer 2011. Ural SU Team.GOV Contest296592

1906The Lost CivilizationUral Championship 2012246639

2076VasianaQualification of Eastern Subregional 2015106675

1536Delights of Pipe-weedUSU Personal Contest 2007516750

1649Abstractionism to the PeopleNEERC 2008 Eastern Subregional407018

1653Death ConveyorNEERC 2008 Eastern Subregional407018

1626Interfering SegmentPetrozavodsk Winter 2008. ITMO Contest377621

1432Twofold LuckUSU Personal Contest 2006458219

1840Victim of AdvertisingUral Championship 2011228419

1678Space Poker 3Petrozavodsk Summer 2008. USU Contest308607

1596Knight Mare179012

1556Multishot in the Secret Cow LevelPetrozavodsk Summer 2007. NSU Contest329304

1415Mobile LifeUSU Championship 2005399500

1376Dean's Pyramid 2Ural Championship 2005. Round 1399536

1390Shots at WallsPetrozavodsk Summer 2005. Moscow+Ural Contest379943

1952To Kill the DragonPetrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection1010320

1399Economical Director2910719

1693Loyd's ProblemPetrozavodsk Winter 2009. USU Contest2110915

1672Droid fliesPetrozavodsk Summer 2008. USU Contest2111105

1555Find the Treasure!Petrozavodsk Summer 2007. NSU Contest2411493

1374MisereUral Championship 2005. Round 12911980

1524Men in BlackPetrozavodsk Winter 2007. D.Gozman Contest2212908

1708Sum of Digits 2Ural Championship 20091612937

1369Cockroach RaceUral Championship 2005. Round 22314114

1383Flower-garden DesignsPetrozavodsk Summer 2005. Moscow+Ural Contest2314161

1388PhotoPetrozavodsk Summer 2005. Moscow+Ural Contest1816690

1548Sakura and StatisticsUral Championship 20071218482

1589SokobanNEERC 2007 Eastern Subregional821512

1394Ships. Version 2825963