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Problem set. NEERC Regionals


2012About Grisha N.NEERC 2014 Eastern Subregional953517

1910Titan Ruins: Hidden EntranceNEERC 2012 Eastern Subregional659633

2023Donald is a postmanNEERC 2014 Eastern Subregional457735

1225FlagsNEERC 2002 Central Subregional1158138

1585PenguinsNEERC 2007 Eastern Subregional920541

1991The battle near the swampNEERC 2013 Eastern Subregional423745

1893A380NEERC 2011 Eastern Subregional445756

1654Cipher MessageNEERC 2008 Eastern Subregional562361

1224SpiralNEERC 2002 Central Subregional654868

1502Domino DotsNEERC 2006 Eastern Subregional556675

1139City BlocksNEERC 2001 Central Subregional562578

1712Cipher GrilleNEERC 2009 Eastern Subregional400078

1510OrderNEERC 2006 Eastern Subregional472589

1161StripiesNEERC 2001 Northern Subregional479391

2018The Debut AlbumNEERC 2014 Eastern Subregional166597

1136ParliamentNEERC 2001 Central Subregional440999

1228ArrayNEERC 2002 Central Subregional4281104

1226esreveR redrONEERC 2002 Central Subregional3987112

1582BookmakersNEERC 2007 Eastern Subregional3280116

1711Code NamesNEERC 2009 Eastern Subregional2526124

2020Traffic Jam in Flower TownNEERC 2014 Eastern Subregional1227132

1280Topological SortingNEERC 2003 Central Subregional3064147

1586Threeprime NumbersNEERC 2007 Eastern Subregional2467154

1506Columns of NumbersNEERC 2006 Eastern Subregional2636159

1135RecruitsNEERC 2001 Central Subregional2672164

1993This cheeseburger you don't needNEERC 2013 Eastern Subregional1094172

1134CardsNEERC 2001 Central Subregional2467177

1800Murphy's LawNEERC 2010 Eastern Subregional1523182

1133Fibonacci SequenceNEERC 2001 Central Subregional2389183

1915Titan Ruins: Reconstruction of BygonesNEERC 2012 Eastern Subregional1162187

1656Far Away Kingdom's ArmyNEERC 2008 Eastern Subregional1750196

1885Passenger ComfortNEERC 2011 Eastern Subregional1252197

1138Integer PercentageNEERC 2001 Central Subregional2200199

1917Titan Ruins: Deadly AccuracyNEERC 2012 Eastern Subregional1090199

1164FillwordNEERC 2001 Northern Subregional2187200

1590Bacon’s CipherNEERC 2007 Eastern Subregional1730220

2019Pair: normal and paranormalNEERC 2014 Eastern Subregional729220

2015Zhenya moves from the dormitoryNEERC 2014 Eastern Subregional665241

1658Sum of DigitsNEERC 2008 Eastern Subregional1408244

1889Airport AnnouncementsNEERC 2011 Eastern Subregional920267

1501Sense of BeautyNEERC 2006 Eastern Subregional1539271

1718RejudgeNEERC 2009 Eastern Subregional1123277

1160NetworkNEERC 2001 Northern Subregional1488298

1137Bus RoutesNEERC 2001 Central Subregional1457299

1998The old PadawanNEERC 2013 Eastern Subregional624299

1227Rally ChampionshipNEERC 2002 Central Subregional1413313

1053PinocchioNEERC 2000 Central Subregional4171315

1588JamaicaNEERC 2007 Eastern Subregional1198316

1282Game TreeNEERC 2003 Central Subregional1321340

1992CVSNEERC 2013 Eastern Subregional541344

1651Shortest SubchainNEERC 2008 Eastern Subregional982348

1804The Machinegunners in a PlayoffNEERC 2010 Eastern Subregional790349

2021Scarily interesting!NEERC 2014 Eastern Subregional453352

1140Swamp IncidentNEERC 2001 Central Subregional1178369

1229Strong BrickworkNEERC 2002 Central Subregional1140388

1055CombinationsNEERC 2000 Central Subregional3319396

1888Pilot Work ExperienceNEERC 2011 Eastern Subregional587415

1279WarehouseNEERC 2003 Central Subregional1068420

1507Difficult DecisionNEERC 2006 Eastern Subregional971428

1997Those are not the droids you're looking forNEERC 2013 Eastern Subregional418443

1162Currency ExchangeNEERC 2001 Northern Subregional980444

2014Zhenya moves from parentsNEERC 2014 Eastern Subregional353449

1890Money out of Thin AirNEERC 2011 Eastern Subregional539452

1650BillionairesNEERC 2008 Eastern Subregional729468

1995Illegal spicesNEERC 2013 Eastern Subregional392471

1158Censored!NEERC 2001 Northern Subregional861504

1056Computer NetNEERC 2000 Central Subregional2466532

1809Chapaev and PotatoesNEERC 2010 Eastern Subregional512535

1721Two Sides of the Same CoinNEERC 2009 Eastern Subregional568542

1920Titan Ruins: the Infinite Power of MagicNEERC 2012 Eastern Subregional370576

1891Language OceanNEERC 2011 Eastern Subregional414585

1713Key SubstringsNEERC 2009 Eastern Subregional523588

1806Mobile TelegraphsNEERC 2010 Eastern Subregional464589

1592Chinese WatchesNEERC 2007 Eastern Subregional637591

1659Regular TrianglesNEERC 2008 Eastern Subregional545623

1059ExpressionNEERC 2000 Central Subregional2092627

1500Pass LicensesNEERC 2006 Eastern Subregional648639

1803The Czechs' RiflesNEERC 2010 Eastern Subregional423645

1054Hanoi TowerNEERC 2000 Central Subregional1996657

1274Fractional ArithmeticNEERC 2003 Central Subregional650686

2074Timus problems classifierQualification of Eastern Subregional 2015169706

1057Amount of DegreesNEERC 2000 Central Subregional1851708

2013Neither shaken nor stirredNEERC 2014 Eastern Subregional216721

1159FenceNEERC 2001 Northern Subregional594728

1230Introspective ProgramNEERC 2002 Central Subregional599732

1892Morning in KoltsovoNEERC 2011 Eastern Subregional326738

1716Alternative SolutionNEERC 2009 Eastern Subregional404757

1276TrainNEERC 2003 Central Subregional563790

1277Cops and ThievesNEERC 2003 Central Subregional563790

1990PodracingNEERC 2013 Eastern Subregional228796

1587Flying PigNEERC 2007 Eastern Subregional469798

1918Titan Ruins: Artful ManipulationsNEERC 2012 Eastern Subregional261807

1912Titan Ruins: Passing through WallsNEERC 2012 Eastern Subregional245858

1994The Emperor's planNEERC 2013 Eastern Subregional210861

1805Chapaev and a Cipher GrilleNEERC 2010 Eastern Subregional313864

1165SubnumberNEERC 2001 Northern Subregional491877

1720Summit Online JudgeNEERC 2009 Eastern Subregional340896

1715Another Ball KillerNEERC 2009 Eastern Subregional326933

1996Cipher Message 3NEERC 2013 Eastern Subregional184977

1278“… Connecting People”NEERC 2003 Central Subregional450984

1591Abstract ThinkingNEERC 2007 Eastern Subregional3691008

2017Best of a bad lotNEERC 2014 Eastern Subregional1461044

1887Frequent Flyer CardNEERC 2011 Eastern Subregional2161097

1584Pharaohs’ SecretsNEERC 2007 Eastern Subregional2981241

1807Cartridges for MaximNEERC 2010 Eastern Subregional1971348

1719Kill the Shaitan-BossNEERC 2009 Eastern Subregional2201363

1657Cube SnakeNEERC 2008 Eastern Subregional2411377

1281River BasinNEERC 2003 Central Subregional3171385

1913Titan Ruins: Alignment of ForcesNEERC 2012 Eastern Subregional1361499

1808Chapaev at the Planet OceanNEERC 2010 Eastern Subregional1551691

1508Japanese PuzzleNEERC 2006 Eastern Subregional2371702

1894Non-Flying WeatherNEERC 2011 Eastern Subregional1351711

1583CheeseNEERC 2007 Eastern Subregional2051778

1802Cube PuzzleNEERC 2010 Eastern Subregional1471778

1503PolynomialNEERC 2006 Eastern Subregional2261781

1886Trip 2NEERC 2011 Eastern Subregional1281797

1919Titan Ruins: Transformation of CylindersNEERC 2012 Eastern Subregional1111808

1163ChapaevNEERC 2001 Northern Subregional2151953

1655Somali PiratesNEERC 2008 Eastern Subregional1622009

1231Turing: One, Two, Three, …NEERC 2002 Central Subregional1992133

1895Steaks on BoardNEERC 2011 Eastern Subregional992276

1504Good MannersNEERC 2006 Eastern Subregional1742285

1232Asteroid LandingNEERC 2002 Central Subregional1852287

2075Take care of your eyebrows!Qualification of Eastern Subregional 2015432384

1717Eligibility RulesNEERC 2009 Eastern Subregional1192430

1652Banking CrisisNEERC 2008 Eastern Subregional1252560

1916Titan Ruins: Waiting for StabilityNEERC 2012 Eastern Subregional722668

1275Knights of the Round TableNEERC 2003 Central Subregional1592679

1714Mnemonics and Palindromes 2NEERC 2009 Eastern Subregional1022798

2022Riding a ToadNEERC 2014 Eastern Subregional472857

1058ChocolateNEERC 2000 Central Subregional4432902

1505Oil TransferNEERC 2006 Eastern Subregional1303002

1911Titan Ruins: Overtaking FireNEERC 2012 Eastern Subregional523529

1166Funny Card GameNEERC 2001 Northern Subregional1173562

1509Domino RecognitionNEERC 2006 Eastern Subregional1033720

1914Titan Ruins: Serial ControlNEERC 2012 Eastern Subregional463907

2077ReductionsQualification of Eastern Subregional 2015155054

1801The Revolution CupNEERC 2010 Eastern Subregional445168

1999The secret moduleNEERC 2013 Eastern Subregional265264

2016Magic and ScienceNEERC 2014 Eastern Subregional166262

2076VasianaQualification of Eastern Subregional 2015106317

1649Abstractionism to the PeopleNEERC 2008 Eastern Subregional406911

1653Death ConveyorNEERC 2008 Eastern Subregional406911

1589SokobanNEERC 2007 Eastern Subregional821231