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Problem set. Number Theory Problems


1049Brave BalloonistsUSU Local Contest. March 20005727239

1086CryptographySpring School Contest 200111466108

1091Tmutarakan ExamsUSU Local Contest. March 20012286512

1104Don’t Ask Woman about Her AgeTetrahedron Team Online Contest May 2001486193

1118Nontrivial NumbersAutumn School Contest 20014451102

1132Square Root763589

1133Fibonacci SequenceNEERC 2001 Central Subregional2075218

1141RSA Attack1246363

1204IdempotentsUSU Local Contest. March 20022023225

1261TipsAutumn School Contest 20031386336

1268Little ChuUSU Championship 2003621743

1286Starship TravelUSU Personal Contest 2004681682

1343Fairy TaleUSU Championship 20041093432

1352Mersenne PrimesSpring School Contest 20053693129

1355Bald Spot RevisitedSpring School Contest 20052207215

1356Something EasierSpring School Contest 20051365347

1430Crime and PunishmentTimus Top Coders: First Challenge999461

1456Jedi Riddle 2Timus Top Coders: Second Challenge597754

1554Multiplicative FunctionsPetrozavodsk Summer 2007. NSU Contest628633

1560Elementary Symmetric FunctionsPetrozavodsk Summer 2007. NSU Contest403978

1593Square Country. Version 2489714

1598DSA Attack324518

1698Square Country 5Petrozavodsk Winter 2009. USU Contest575603

1748The Most Complex NumberPetrozavodsk Summer 2009. Ufa SATU Contest1262255

1807Cartridges for MaximNEERC 2010 Eastern Subregional2121354

2047MathsUral Championship 2015413409

2070Interesting NumbersUral Regional School Programming Contest 2015798200

2102Michael and CryptographyUral FU Junior Championship 20161064124

2117Polyphemus' triplesUniversity academic school olympiad in informatics 2019150474

2124Algebra on SegmentPetrozavodsk Summer 2018. t.me/umnik_team Contest491247

2138The Good, the Bad and the UglyUral School Programming Contest 2019626100