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Problem set. Number Theory Problems


1104Don’t Ask Woman about Her AgeTetrahedron Team Online Contest May 2001486793

2138The Good, the Bad and the UglyUral School Programming Contest 201963199

1118Nontrivial NumbersAutumn School Contest 20014457102

1086CryptographySpring School Contest 200111470108

2102Michael and CryptographyUral FU Junior Championship 20161066124

1352Mersenne PrimesSpring School Contest 20053695129

2070Interesting NumbersUral Regional School Programming Contest 2015800200

1355Bald Spot RevisitedSpring School Contest 20052208215

1133Fibonacci SequenceNEERC 2001 Central Subregional2076218

1204IdempotentsUSU Local Contest. March 20022024225

1049Brave BalloonistsUSU Local Contest. March 20005727239

1748The Most Complex NumberPetrozavodsk Summer 2009. Ufa SATU Contest1263255

1261TipsAutumn School Contest 20031386336

1356Something EasierSpring School Contest 20051365347

1141RSA Attack1247363

2047MathsUral Championship 2015413410

1343Fairy TaleUSU Championship 20041094432

1430Crime and PunishmentTimus Top Coders: First Challenge1000461

2117Polyphemus' triplesUniversity academic school olympiad in informatics 2019150476

1091Tmutarakan ExamsUSU Local Contest. March 20012287512

1132Square Root763590

1698Square Country 5Petrozavodsk Winter 2009. USU Contest575604

1554Multiplicative FunctionsPetrozavodsk Summer 2007. NSU Contest629633

1286Starship TravelUSU Personal Contest 2004682681

1593Square Country. Version 2492710

1268Little ChuUSU Championship 2003621743

1456Jedi Riddle 2Timus Top Coders: Second Challenge597755

1560Elementary Symmetric FunctionsPetrozavodsk Summer 2007. NSU Contest403979

2124Algebra on SegmentPetrozavodsk Summer 2018. t.me/umnik_team Contest491253

1807Cartridges for MaximNEERC 2010 Eastern Subregional2151337

1598DSA Attack324525