The training manual sets out the basic concepts of algorithms for solving problems on electronic computers (computers), the procedure for preparing and solving problems Much attention is paid to such topics as algorithm development methods, algorithms for working with various types of data, combinatorics algorithms. The theoretical material is illustrated by real working examples. The training manual is intended for students of the Faculty of Mechanics and Mathematics of the UNN, studying in the areas of training 01. 03. 01 "Mathematics", 02. 03. 01 "Mathematics and Computer Science", 01. 03. 02 "Applied Mathematics and Computer Science", 01. 03. 03 "Mechanics and mathematical modeling", and for students of the Institute of Economics and Entrepreneurship of the UNN, studying in the direction of training 38. 03. 05 "Business Informatics" . It is also addressed to students of other faculties who study programming languages . This tutorial will be useful to all users seeking to effectively use modern information technologies.