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Problem set. Hardest Problems


1171Lost in SpaceRomanian Online Contest December 20013401301

1177Like ComparisonsUSU Personal Contest 20023381312

1148Building TowersDSAP Vietnam Online Contest November 20012481763

1216Two Pawns and One KingUSU Championship 20022162041

1074Very Short ProblemUSU Personal Contest 20016012059

1395Pascal vs. C++. Version 21662592

1058ChocolateNEERC 2000 Central Subregional4712834

1695Work for RobotsPetrozavodsk Winter 2009. USU Contest1142836

1714Mnemonics and Palindromes 2NEERC 2009 Eastern Subregional1062868

1464LightPetrozavodsk Winter 2006. USU Contest1442888

1312TrayUral Championship 2004. Round 11532889

1239Ghost BustersNEERC 20021472943

1438Time Limit ExceededUSU Personal Contest 20061403087

1954Five PalindromesPetrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection543474

1166Funny Card GameNEERC 2001 Northern Subregional1213571


1843Cutting a ParallelepipedPetrozavodsk Summer 2010. USU Contest643682

1478Spy SatellitesPetrozavodsk Summer 2006. Ural+Orel Contest1033896

1661DodecahedronPetrozavodsk Winter 2008. USU Contest774130

1460WiresPetrozavodsk Winter 2006. USU Contest964196

1344Gigantic TurnipUSU Championship 2004974445

1271Sailing DirectionsUSU Championship 2003924588

1662Goat in the Garden 6Petrozavodsk Winter 2008. USU Contest684607

1621Definite IntegralPetrozavodsk Winter 2008. ITMO Contest694697

1594Aztec Treasure624786

1763Expert FleaUral Championship 2010525107

1384Goat in the Garden 4Petrozavodsk Summer 2005. Moscow+Ural Contest835140

1618Arrays PrintingPetrozavodsk Winter 2008. ITMO Contest615226

1391SnakePetrozavodsk Summer 2005. Moscow+Ural Contest805311

1479Scheduled CheckingPetrozavodsk Summer 2006. Ural+Orel Contest725368

1848Fly HuntPetrozavodsk Summer 2010. USU Contest405449

1674Drunk KingPetrozavodsk Summer 2008. USU Contest486162

1842Local RootsPetrozavodsk Summer 2010. USU Contest346192

1668Death Star 2Petrozavodsk Winter 2008. USU Contest476304

1660The Island of Bad LuckPetrozavodsk Winter 2008. USU Contest476305

1819Professional ApproachPetrozavodsk Summer 2010. Tavrida NU Contest356479

2082PokerUral Championship 2016126505

1624Go out of here!Petrozavodsk Winter 2008. ITMO Contest476509

2076VasianaQualification of Eastern Subregional 2015136559

2054AstronomyUral Championship 2015166598

1906The Lost CivilizationUral Championship 2012266701

1653Death ConveyorNEERC 2008 Eastern Subregional446739

1536Delights of Pipe-weedUSU Personal Contest 2007526831

2016Magic and ScienceNEERC 2014 Eastern Subregional176900

1853Laser TechnologiesPetrozavodsk Summer 2011. Ural SU Team.GOV Contest296973

1649Abstractionism to the PeopleNEERC 2008 Eastern Subregional426998

1626Interfering SegmentPetrozavodsk Winter 2008. ITMO Contest377894

1432Twofold LuckUSU Personal Contest 2006468268

1840Victim of AdvertisingUral Championship 2011238608

1596Knight Mare198913

1678Space Poker 3Petrozavodsk Summer 2008. USU Contest308935

1556Multishot in the Secret Cow LevelPetrozavodsk Summer 2007. NSU Contest349158

1415Mobile LifeUSU Championship 2005419337

1376Dean's Pyramid 2Ural Championship 2005. Round 1399753

1390Shots at WallsPetrozavodsk Summer 2005. Moscow+Ural Contest399755

1399Economical Director3010742

1693Loyd's ProblemPetrozavodsk Winter 2009. USU Contest2210988

1952To Kill the DragonPetrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection1011114

1672Droid fliesPetrozavodsk Summer 2008. USU Contest2211169

1374MisereUral Championship 2005. Round 13211379

1555Find the Treasure!Petrozavodsk Summer 2007. NSU Contest2511513

1708Sum of Digits 2Ural Championship 20091812487

1524Men in BlackPetrozavodsk Winter 2007. D.Gozman Contest2412494

1369Cockroach RaceUral Championship 2005. Round 22613235

1383Flower-garden DesignsPetrozavodsk Summer 2005. Moscow+Ural Contest2414058

1388PhotoPetrozavodsk Summer 2005. Moscow+Ural Contest1916482

1548Sakura and StatisticsUral Championship 20071417437

1589SokobanNEERC 2007 Eastern Subregional921026

1394Ships. Version 21221728