Шедевр от Кирилла Бельского из старшей лиги прошедшей сегодня устной командной олимпиады JetBrains. Задача, в которой есть секрет, которого, возможно, никто из участников и не увидел...
Серединный перпендикуляр к биссектрисе AL треугольника ABC пересекает стороны AB и AC в точках F и E, а описанную окружность Omega треугольника в точках P и Q. Касательные в точках P и Q к Omega пересекаются в точке R. Докажите, что описанные окружности треугольников AEF и PQR касаются.
Шедевр от Кирилла Бельского из старшей лиги прошедшей сегодня устной командной олимпиады JetBrains. Задача, в которой есть секрет, которого, возможно, никто из участников и не увидел...
Серединный перпендикуляр к биссектрисе AL треугольника ABC пересекает стороны AB и AC в точках F и E, а описанную окружность Omega треугольника в точках P и Q. Касательные в точках P и Q к Omega пересекаются в точке R. Докажите, что описанные окружности треугольников AEF и PQR касаются.
Official government accounts have also spread fake fact checks. An official Twitter account for the Russia diplomatic mission in Geneva shared a fake debunking video claiming without evidence that "Western and Ukrainian media are creating thousands of fake news on Russia every day." The video, which has amassed almost 30,000 views, offered a "how-to" spot misinformation. "Like the bombing of the maternity ward in Mariupol," he said, "Even before it hits the news, you see the videos on the Telegram channels." Either way, Durov says that he withdrew his resignation but that he was ousted from his company anyway. Subsequently, control of the company was reportedly handed to oligarchs Alisher Usmanov and Igor Sechin, both allegedly close associates of Russian leader Vladimir Putin. The regulator said it had received information that messages containing stock tips and other investment advice with respect to selected listed companies are being widely circulated through websites and social media platforms such as Telegram, Facebook, WhatsApp and Instagram. If you initiate a Secret Chat, however, then these communications are end-to-end encrypted and are tied to the device you are using. That means it’s less convenient to access them across multiple platforms, but you are at far less risk of snooping. Back in the day, Secret Chats received some praise from the EFF, but the fact that its standard system isn’t as secure earned it some criticism. If you’re looking for something that is considered more reliable by privacy advocates, then Signal is the EFF’s preferred platform, although that too is not without some caveats.
from nl
