Задача 53: Автор - Пучков Пëтр Источник - Олимпиада по геометрии имени Шарыгина 2024, задача 9.4
При каких n на плоскости можно отметить несколько точек и окружностей так, что выполнены условия: - На каждой окружности лежит ровно n точек - Через каждую точку проходит ровно n окружностей - У каждой окружности отмечен центр
Задача 53: Автор - Пучков Пëтр Источник - Олимпиада по геометрии имени Шарыгина 2024, задача 9.4
При каких n на плоскости можно отметить несколько точек и окружностей так, что выполнены условия: - На каждой окружности лежит ровно n точек - Через каждую точку проходит ровно n окружностей - У каждой окружности отмечен центр
BY NeuroGeometry
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You may recall that, back when Facebook started changing WhatsApp’s terms of service, a number of news outlets reported on, and even recommended, switching to Telegram. Pavel Durov even said that users should delete WhatsApp “unless you are cool with all of your photos and messages becoming public one day.” But Telegram can’t be described as a more-secure version of WhatsApp. In the past, it was noticed that through bulk SMSes, investors were induced to invest in or purchase the stocks of certain listed companies. "The result is on this photo: fiery 'greetings' to the invaders," the Security Service of Ukraine wrote alongside a photo showing several military vehicles among plumes of black smoke. Pavel Durov, a billionaire who embraces an all-black wardrobe and is often compared to the character Neo from "the Matrix," funds Telegram through his personal wealth and debt financing. And despite being one of the world's most popular tech companies, Telegram reportedly has only about 30 employees who defer to Durov for most major decisions about the platform. Telegram has gained a reputation as the “secure” communications app in the post-Soviet states, but whenever you make choices about your digital security, it’s important to start by asking yourself, “What exactly am I securing? And who am I securing it from?” These questions should inform your decisions about whether you are using the right tool or platform for your digital security needs. Telegram is certainly not the most secure messaging app on the market right now. Its security model requires users to place a great deal of trust in Telegram’s ability to protect user data. For some users, this may be good enough for now. For others, it may be wiser to move to a different platform for certain kinds of high-risk communications.
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