Title (Romanian): Elemente de algoritmica - probleme si solutiiTitle (English): Elements of Algorithmics - Problems and SolutionsISBN: 9786068288154There are many books which propose a large number of problems to be solved to their readers, while presenting only solutions for a small number of the proposed problems. The author's opinion is that these books justify their existence only partially. The Internet is full of problem statements, of various degrees of difficulty (see just a few of the links from the end of the book), most of them not being accompanied by explanations.Nowadays there is no lack of training materials (with so many online sources of problems), but rather of sources of well structured and comprehensible explanations. This book was written with the purpose of addressing this lack of algorithmic explanations. The book's chapters approach various topics and present problems with various degrees of difficulty, accompanied by complete and structured explanations.The book is distributed in electronic format only and also contains an archive of auxiliary materials (problem statements, source code, solution descriptions, etc.), whose purpose is to complement the structured explanations within the book.The problems discussed in this book were previously proposed at various algorithmic contests and school olympiads, like the national olympiads from various countries, international olympiads, ACM ICPC contests, etc. The presented solutions were developed by the author for the most part. A small number of solution descriptions were adapted from the official solution descriptions presented at the contests where the problems were proposed.The problems included in the auxiliary materials are accompanied by source code and brief explanations developed by the author, as well as official solutions (or other solutions) of those problems.At the time of writing this book the author is a lecturer in the Department of Computer Science, at the Politehnica University of Bucharest. The content of the book was based on the author's experience as a participant at many national and international Informatics contests (the national and international olympiad in Informatics, the ACM ICPC World Finals, etc.), as well as that of member of the scientific committee of such contests (the national olympiad in Informatics, the Central European Olympiad in Informatics, the Balkan Olympiad in Informatics, the ACM ICPC Southeastern European Regional Contest, .campion contest, etc.).