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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He floated the idea of restricting the use of Telegram in Ukraine and Russia, a suggestion that was met with fierce opposition from users. Shortly after, Durov backed off the idea. On Feb. 27, however, he admitted from his Russian-language account that "Telegram channels are increasingly becoming a source of unverified information related to Ukrainian events." The War on Fakes channel has repeatedly attempted to push conspiracies that footage from Ukraine is somehow being falsified. One post on the channel from February 24 claimed without evidence that a widely viewed photo of a Ukrainian woman injured in an airstrike in the city of Chuhuiv was doctored and that the woman was seen in a different photo days later without injuries. The post, which has over 600,000 views, also baselessly claimed that the woman's blood was actually makeup or grape juice. On February 27th, Durov posted that Channels were becoming a source of unverified information and that the company lacks the ability to check on their veracity. He urged users to be mistrustful of the things shared on Channels, and initially threatened to block the feature in the countries involved for the length of the war, saying that he didn’t want Telegram to be used to aggravate conflict or incite ethnic hatred. He did, however, walk back this plan when it became clear that they had also become a vital communications tool for Ukrainian officials and citizens to help coordinate their resistance and evacuations. Ukrainian forces successfully attacked Russian vehicles in the capital city of Kyiv thanks to a public tip made through the encrypted messaging app Telegram, Ukraine's top law-enforcement agency said on Tuesday.
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