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Problem set. Number Theory Problems


1049Brave BalloonistsUSU Local Contest. March 20005250236

1086CryptographySpring School Contest 20019668115

1091Tmutarakan ExamsUSU Local Contest. March 20012161489

1104Don’t Ask Woman about Her AgeTetrahedron Team Online Contest May 2001426296

1118Nontrivial NumbersAutumn School Contest 20014079101

1132Square Root617658

1133Fibonacci SequenceNEERC 2001 Central Subregional2217185

1141RSA Attack1100372

1204IdempotentsUSU Local Contest. March 20021797230

1261TipsAutumn School Contest 20031209350

1268Little ChuUSU Championship 2003527795

1286Starship TravelUSU Personal Contest 2004624677

1343Fairy TaleUSU Championship 20041093395

1352Mersenne PrimesSpring School Contest 20053246134

1355Bald Spot RevisitedSpring School Contest 20051879231

1356Something EasierSpring School Contest 20051195362

1430Crime and PunishmentTimus Top Coders: First Challenge878477

1456Jedi Riddle 2Timus Top Coders: Second Challenge519785

1554Multiplicative FunctionsPetrozavodsk Summer 2007. NSU Contest567619

1560Elementary Symmetric FunctionsPetrozavodsk Summer 2007. NSU Contest355978

1593Square Country. Version 2398749

1598DSA Attack204188

1698Square Country 5Petrozavodsk Winter 2009. USU Contest512578

1748The Most Complex NumberPetrozavodsk Summer 2009. Ufa SATU Contest989272

1807Cartridges for MaximNEERC 2010 Eastern Subregional1821278

2047MathsUral Championship 2015270385

2070Interesting NumbersUral Regional School Programming Contest 2015470198

2102Michael and CryptographyUral FU Junior Championship 2016505126