<iframe width="480" height="270" src="https://dzen.ru/embed/v2fdKIGSER2U?from_block=partner&from=zen&mute=0&autoplay=0&tv=0" allow="autoplay; fullscreen; accelerometer; gyroscope; picture-in-picture; encrypted-media" frameborder="0" scrolling="no" allowfullscreen></iframe>Дискретная математика. Теория графов