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Problem set. Number Theory Problems


1049Brave BalloonistsUSU Local Contest. March 20005164236

1086CryptographySpring School Contest 20019466116

1091Tmutarakan ExamsUSU Local Contest. March 20012143486

1104Don’t Ask Woman about Her AgeTetrahedron Team Online Contest May 2001417296

1118Nontrivial NumbersAutumn School Contest 20013971102

1132Square Root593674

1133Fibonacci SequenceNEERC 2001 Central Subregional2179186

1141RSA Attack1085371

1204IdempotentsUSU Local Contest. March 20021769230

1261TipsAutumn School Contest 20031181353

1268Little ChuUSU Championship 2003516800

1286Starship TravelUSU Personal Contest 2004615677

1343Fairy TaleUSU Championship 20041070397

1352Mersenne PrimesSpring School Contest 20053196134

1355Bald Spot RevisitedSpring School Contest 20051832233

1356Something EasierSpring School Contest 20051162367

1430Crime and PunishmentTimus Top Coders: First Challenge865477

1456Jedi Riddle 2Timus Top Coders: Second Challenge501800

1554Multiplicative FunctionsPetrozavodsk Summer 2007. NSU Contest555620

1560Elementary Symmetric FunctionsPetrozavodsk Summer 2007. NSU Contest345986

1593Square Country. Version 2386753

1598DSA Attack194015

1698Square Country 5Petrozavodsk Winter 2009. USU Contest504573

1748The Most Complex NumberPetrozavodsk Summer 2009. Ufa SATU Contest961271

1807Cartridges for MaximNEERC 2010 Eastern Subregional1771269

2047MathsUral Championship 2015246384

2070Interesting NumbersUral Regional School Programming Contest 2015416200

2102Michael and CryptographyUral FU Junior Championship 2016405133