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Problem set. Number Theory Problems


1049Brave BalloonistsUSU Local Contest. March 20005197237

1086CryptographySpring School Contest 20019544116

1091Tmutarakan ExamsUSU Local Contest. March 20012151489

1104Don’t Ask Woman about Her AgeTetrahedron Team Online Contest May 2001422096

1118Nontrivial NumbersAutumn School Contest 20014025101

1132Square Root615656

1133Fibonacci SequenceNEERC 2001 Central Subregional2205185

1141RSA Attack1095371

1204IdempotentsUSU Local Contest. March 20021781230

1261TipsAutumn School Contest 20031201350

1268Little ChuUSU Championship 2003521800

1286Starship TravelUSU Personal Contest 2004622675

1343Fairy TaleUSU Championship 20041081397

1352Mersenne PrimesSpring School Contest 20053225134

1355Bald Spot RevisitedSpring School Contest 20051858232

1356Something EasierSpring School Contest 20051177365

1430Crime and PunishmentTimus Top Coders: First Challenge870478

1456Jedi Riddle 2Timus Top Coders: Second Challenge513789

1554Multiplicative FunctionsPetrozavodsk Summer 2007. NSU Contest564617

1560Elementary Symmetric FunctionsPetrozavodsk Summer 2007. NSU Contest351981

1593Square Country. Version 2394749

1598DSA Attack194208

1698Square Country 5Petrozavodsk Winter 2009. USU Contest509576

1748The Most Complex NumberPetrozavodsk Summer 2009. Ufa SATU Contest980271

1807Cartridges for MaximNEERC 2010 Eastern Subregional1801275

2047MathsUral Championship 2015255393

2070Interesting NumbersUral Regional School Programming Contest 2015443201

2102Michael and CryptographyUral FU Junior Championship 2016472127