One of the directions of developing the abilities of talented youth is the organization of Olympiad work. The article discusses the tasks that organize the preparation of students for computer science Olympiads and arise before the teacher. Specialized Internet resources are available for conducting programming Olympiads and preparing participants for them. Tasks can be automated due to their large number and complexity, which, when performed manually, leads to a limitation of the actions of students in decision-making. The system of automatic verification of programming tasks was considered as a means of automating these tasks and improving the effectiveness of classes with students. Various variants of publicly available systems for automatic verification of programming tasks are analyzed (Yandex.Contest, acmp.ru (school of programmers), informatics.msk.ru (distance training in computer science) and their capabilities. Taking into account the features of these systems, the choice of the best of them is justified (informatics.msk.ru), which is recommended as a tool for conducting classes and organizing independent work of students. The conclusion is made about the availability and high potential of such a system.