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Problem set. Number Theory Problems


IDTitleSourceAuthorsDifficulty

1086CryptographySpring School Contest 200110774110

1049Brave BalloonistsUSU Local Contest. March 20005506239

1104Don’t Ask Woman about Her AgeTetrahedron Team Online Contest May 2001464594

1118Nontrivial NumbersAutumn School Contest 2001454496

1352Mersenne PrimesSpring School Contest 20053547130

1133Fibonacci SequenceNEERC 2001 Central Subregional2389183

1091Tmutarakan ExamsUSU Local Contest. March 20012255499

1355Bald Spot RevisitedSpring School Contest 20052086220

1204IdempotentsUSU Local Contest. March 20021929228

1261TipsAutumn School Contest 20031320340

1356Something EasierSpring School Contest 20051295353

1141RSA Attack1184367

1343Fairy TaleUSU Championship 20041175388

1748The Most Complex NumberPetrozavodsk Summer 2009. Ufa SATU Contest1162259

1430Crime and PunishmentTimus Top Coders: First Challenge953466

2102Michael and CryptographyUral FU Junior Championship 2016921115

1132Square Root708611

2070Interesting NumbersUral Regional School Programming Contest 2015673198

1286Starship TravelUSU Personal Contest 2004655684

1554Multiplicative FunctionsPetrozavodsk Summer 2007. NSU Contest601631

1268Little ChuUSU Championship 2003584762

1456Jedi Riddle 2Timus Top Coders: Second Challenge565767

1698Square Country 5Petrozavodsk Winter 2009. USU Contest546598

1593Square Country. Version 2442744

1560Elementary Symmetric FunctionsPetrozavodsk Summer 2007. NSU Contest383981

2047MathsUral Championship 2015359400

1807Cartridges for MaximNEERC 2010 Eastern Subregional1971347

2117Polyphemus' triplesUniversity academic school olympiad in informatics 201975554

1598DSA Attack284330

2124Algebra on SegmentPetrozavodsk Summer 2018. t.me/umnik_team Contest201491