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Problem set. Number Theory Problems


1049Brave BalloonistsUSU Local Contest. March 20005142236

1086CryptographySpring School Contest 20019394116

1091Tmutarakan ExamsUSU Local Contest. March 20012138484

1104Don’t Ask Woman about Her AgeTetrahedron Team Online Contest May 2001414196

1118Nontrivial NumbersAutumn School Contest 20013939102

1132Square Root590673

1133Fibonacci SequenceNEERC 2001 Central Subregional2168185

1141RSA Attack1078371

1204IdempotentsUSU Local Contest. March 20021756230

1261TipsAutumn School Contest 20031175353

1268Little ChuUSU Championship 2003514799

1286Starship TravelUSU Personal Contest 2004609680

1343Fairy TaleUSU Championship 20041062398

1352Mersenne PrimesSpring School Contest 20053186134

1355Bald Spot RevisitedSpring School Contest 20051823233

1356Something EasierSpring School Contest 20051146370

1430Crime and PunishmentTimus Top Coders: First Challenge859478

1456Jedi Riddle 2Timus Top Coders: Second Challenge499799

1554Multiplicative FunctionsPetrozavodsk Summer 2007. NSU Contest555615

1560Elementary Symmetric FunctionsPetrozavodsk Summer 2007. NSU Contest343985

1593Square Country. Version 2385748

1598DSA Attack193898

1698Square Country 5Petrozavodsk Winter 2009. USU Contest500572

1748The Most Complex NumberPetrozavodsk Summer 2009. Ufa SATU Contest950272

1807Cartridges for MaximNEERC 2010 Eastern Subregional1761260

2047MathsUral Championship 2015236386

2070Interesting NumbersUral Regional School Programming Contest 2015405197

2102Michael and CryptographyUral FU Junior Championship 2016360140