Help the Military Recruitment Office!) Problem HASHIT (29. The Bytelandian Cryptographer (Act IV)) Problem TRICENTR (22. The Bytelandian Cryptographer (Act III)) Problem CRYPTO4 (20. The Bytelandian Cryptographer (Act II)) Problem CRYPTO3 (19. The Bytelandian Cryptographer (Act I)) Problem CRYPTO2 (18. Sphere in a tetrahedron) Problem CRYPTO1 (17. The Game of Master-Mind) Problem HOTLINE (13. Complicated Expressions) Problem FCTRL (11. Complete the Sequence!) Problem DIRVS (9. Transform the Expression) Problem PALIN (5. Substring Check (Bug Funny)) Problem ONP (4. Life, the Universe, and Everything) Problem PRIME1 (2. Remarks concerning this document should be sent to the following e-mail address: When referring to or citing the whole or a fragment of this document, please state clearly the aforementioned URLs at which the document is to be found, as well as the resources from which the problems you are referring to originally came. No responsibility is taken by the Editors if use or redistribution of this document violates either their or third party copyright laws. The document as a whole is not protected by copyright, and fragments of it are to be regarded independently.
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The document can be accessed at the following URLs: in PostScript format: in Portable Document Format: These resources are constantly updated to synchronise with the ever-changing hypertext version of the problems, and to include newly added problems. Preface This electronic material contains a set of algorithmic problems, forming the archives of the Sphere Online Judge (), classical problemset. Osuch Josef Ziegler Fernando Torres Reinier César Mujica Gogu Marian Hdez Slobodan Tamer Le Trong Dao Krzysztof Kluczek Muntasir Azam Khan Jose Daniel Rdguez Nghia Nguyen Hoang Abel Nieto Rodriguez Ivan Katanić Lukas Mai Mislav Balunović Stephen Merriman Gogo40 Chinh Nguyen Yash Stjepan Glavina Robert Rychcicki Paweł Dobrzycki Camilo Bravo Valdés Patryk Pomykalski Konrad Piwakowski 3xian Zhang Taizhi Paul Draper Maciej Boniecki Andrés Mejía-Posada Mauro Persano Lordxfastx mukulrajput Tomek Czajka Paulo Roberto Santos de Łukasz Kuszner Sousa arun P.Kasthuri RanganMark Gordon Sebastian Kanthak Nikhil Garg Angel Paredes Ortiz Jargon rajeshsr Ruslan Sennov Bartłomiej Kowalski HNUE Ivan Alfonso Olamendy Yandry Pérez Clemente Hari Lovro Puzar Martin Bader suhash Piotr Kąkol Tomasz Niedzwiecki Piotr Piotrowski Andres Galvis Tomasz Goluch Pripoae Toni Leandro Castillo Valdes Radu Grigore Rahul Phan Công Minh Ronaldo Gustav Matula Frane Kurtović Bogusław K.
XilinX sieunhan Adrian Kosowski Kashyap KBR Adrian Kuegel Phenomenal Camilo Andrés Nguyen Dinh TuVarela León u.swarnaprakash Jin Bin Leonardo Rojas Andrés Thanh-Vy Hua Duarte Roman Sol Ivan Metelsky WanderleyReject Guimaraes HYPSMC Spooky VOJ problem setters Jelani Nelson (Minilek) Paritosh Aggarwal Michał Le Đôn Czuczman Khue Daniel Gómez Didier Mohammad Kotb Ngô Minh Đu+’c Frank Rafael Arteaga Neal Wu Csaba Noszaly PrasannaMode (Jor-sean) Analysis Piotr Łowiec Abhilash I Varun Jalan Alfonso2 Peterssen RobinKalinovcic Nittka Luka AhmedDereniowski Aly Darek Adam Dzedzej Nguye^~n Ha Du+o+ng Nikola PMinh Borisov Nguyen Hieu AjayWasi Somani Mir Ahmed Diego Satoba Qu Jun Pawel Avellaneda Gawrychowski Fabio Matthew Reeder Miorel Palii Rafal Hong Quan Hoang Marco Gallotta Nguyen Van Quang Huy Hemant Verma Jonas Wagner Pavel Kuznetsov Bobby Xiao Robert Gerbicz Paranoid Android Simon Gog Rahul Garg John Zane Rizzo Neal Race with time Michał Małafiejski abhijith reddy d Chen Xiaohong Archives of the Sphere Online Judge classical problemset