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Problem set. Number Theory Problems


1049Brave BalloonistsUSU Local Contest. March 20005265236

1086CryptographySpring School Contest 20019762115

1091Tmutarakan ExamsUSU Local Contest. March 20012168491

1104Don’t Ask Woman about Her AgeTetrahedron Team Online Contest May 2001429895

1118Nontrivial NumbersAutumn School Contest 20014114100

1132Square Root622656

1133Fibonacci SequenceNEERC 2001 Central Subregional2230185

1141RSA Attack1109371

1204IdempotentsUSU Local Contest. March 20021801231

1261TipsAutumn School Contest 20031213351

1268Little ChuUSU Championship 2003530795

1286Starship TravelUSU Personal Contest 2004626679

1343Fairy TaleUSU Championship 20041100394

1352Mersenne PrimesSpring School Contest 20053263134

1355Bald Spot RevisitedSpring School Contest 20051888231

1356Something EasierSpring School Contest 20051202361

1430Crime and PunishmentTimus Top Coders: First Challenge881478

1456Jedi Riddle 2Timus Top Coders: Second Challenge519789

1554Multiplicative FunctionsPetrozavodsk Summer 2007. NSU Contest575615

1560Elementary Symmetric FunctionsPetrozavodsk Summer 2007. NSU Contest356982

1593Square Country. Version 2402748

1598DSA Attack233914

1698Square Country 5Petrozavodsk Winter 2009. USU Contest515580

1748The Most Complex NumberPetrozavodsk Summer 2009. Ufa SATU Contest996273

1807Cartridges for MaximNEERC 2010 Eastern Subregional1831287

2047MathsUral Championship 2015281383

2070Interesting NumbersUral Regional School Programming Contest 2015486199

2102Michael and CryptographyUral FU Junior Championship 2016537126