The competition, organized by [Yandex School of Data Analysis](http://yandexdataschool.com/) , is a part of [Data&Science](https://events.yandex.ru/events/ds/17-sept-2016/) events. The task is to classify events (proton-proton collisions) into "interesting" (1-labeled samples), which probably contain searched physics and should be stored into memory, versus "non-interesting" (0-labeled samples), that should not be stored. The system which defines "interesting" events is called trigger system and works in real-time (online). This is the first stage of selecting event for further analysis in high energy physics experiments. In this competition, you should build a trigger system which efficiently selects events. Speed of the algorithm for online events processing is another story, you can ignore this factor during competition. To prepare your first submission see the notebook in the Data section. You can ask questions in the competition forum. Good luck! Acknowledgments We thank Mike Williams and Philip Iten for help in preparing this toy dataset.