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Problem set. Hardest Problems


IDTitleSourceAuthorsDifficulty

1177Like ComparisonsUSU Personal Contest 20023551258

1171Lost in SpaceRomanian Online Contest December 20013441294

1148Building TowersDSAP Vietnam Online Contest November 20012521746

1216Two Pawns and One KingUSU Championship 20022162053

1074Very Short ProblemUSU Personal Contest 20016052058

1395Pascal vs. C++. Version 21672593

1058ChocolateNEERC 2000 Central Subregional4742834

1695Work for RobotsPetrozavodsk Winter 2009. USU Contest1152838

1464LightPetrozavodsk Winter 2006. USU Contest1472850

1312TrayUral Championship 2004. Round 11542887

1714Mnemonics and Palindromes 2NEERC 2009 Eastern Subregional1062896

1239Ghost BustersNEERC 20021472960

1438Time Limit ExceededUSU Personal Contest 20061462985

1954Five PalindromesPetrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection553479

1166Funny Card GameNEERC 2001 Northern Subregional1213591

1199Mouse1083666

1843Cutting a ParallelepipedPetrozavodsk Summer 2010. USU Contest643730

1478Spy SatellitesPetrozavodsk Summer 2006. Ural+Orel Contest1043885

1661DodecahedronPetrozavodsk Winter 2008. USU Contest774166

1460WiresPetrozavodsk Winter 2006. USU Contest974182

1618Arrays PrintingPetrozavodsk Winter 2008. ITMO Contest754401

1344Gigantic TurnipUSU Championship 2004974469

1271Sailing DirectionsUSU Championship 2003924613

1662Goat in the Garden 6Petrozavodsk Winter 2008. USU Contest684647

1594Aztec Treasure644700

1621Definite IntegralPetrozavodsk Winter 2008. ITMO Contest694736

1763Expert FleaUral Championship 2010535079

1384Goat in the Garden 4Petrozavodsk Summer 2005. Moscow+Ural Contest835167

1391SnakePetrozavodsk Summer 2005. Moscow+Ural Contest815281

1479Scheduled CheckingPetrozavodsk Summer 2006. Ural+Orel Contest735336

1848Fly HuntPetrozavodsk Summer 2010. USU Contest405520

1674Drunk KingPetrozavodsk Summer 2008. USU Contest525815

1624Go out of here!Petrozavodsk Winter 2008. ITMO Contest545845

1668Death Star 2Petrozavodsk Winter 2008. USU Contest486250

1842Local RootsPetrozavodsk Summer 2010. USU Contest346273

1660The Island of Bad LuckPetrozavodsk Winter 2008. USU Contest476359

2054AstronomyUral Championship 2015176503

1819Professional ApproachPetrozavodsk Summer 2010. Tavrida NU Contest356556

1906The Lost CivilizationUral Championship 2012276620

1653Death ConveyorNEERC 2008 Eastern Subregional456673

2082PokerUral Championship 2016126695

2076VasianaQualification of Eastern Subregional 2015136739

1649Abstractionism to the PeopleNEERC 2008 Eastern Subregional446797

1536Delights of Pipe-weedUSU Personal Contest 2007526876

2016Magic and ScienceNEERC 2014 Eastern Subregional177047

1853Laser TechnologiesPetrozavodsk Summer 2011. Ural SU Team.GOV Contest297064

1678Space Poker 3Petrozavodsk Summer 2008. USU Contest387511

1626Interfering SegmentPetrozavodsk Winter 2008. ITMO Contest387794

1432Twofold LuckUSU Personal Contest 2006478169

1840Victim of AdvertisingUral Championship 2011238713

1415Mobile LifeUSU Championship 2005439033

1596Knight Mare199038

1556Multishot in the Secret Cow LevelPetrozavodsk Summer 2007. NSU Contest349225

1376Dean's Pyramid 2Ural Championship 2005. Round 1409609

1390Shots at WallsPetrozavodsk Summer 2005. Moscow+Ural Contest409611

1693Loyd's ProblemPetrozavodsk Winter 2009. USU Contest2310751

1952To Kill the DragonPetrozavodsk Winter 2013. Kontur Cup. ChU 2013 Selection1110766

1399Economical Director3010812

1672Droid fliesPetrozavodsk Summer 2008. USU Contest2310925

1374MisereUral Championship 2005. Round 13211439

1555Find the Treasure!Petrozavodsk Summer 2007. NSU Contest2511597

1708Sum of Digits 2Ural Championship 20091912166

1524Men in BlackPetrozavodsk Winter 2007. D.Gozman Contest2412577

1369Cockroach RaceUral Championship 2005. Round 22613306

1383Flower-garden DesignsPetrozavodsk Summer 2005. Moscow+Ural Contest2513730

1388PhotoPetrozavodsk Summer 2005. Moscow+Ural Contest1916570

1548Sakura and StatisticsUral Championship 20071417555

1589SokobanNEERC 2007 Eastern Subregional921180

1394Ships. Version 21221843