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Каким минимальным числом непрозрачных попарно непересекающихся шаров можно загородить точечный источник света? А если все шары равны?



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Каким минимальным числом непрозрачных попарно непересекающихся шаров можно загородить точечный источник света? А если все шары равны?

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Anastasia Vlasova/Getty Images For Oleksandra Tsekhanovska, head of the Hybrid Warfare Analytical Group at the Kyiv-based Ukraine Crisis Media Center, the effects are both near- and far-reaching. Crude oil prices edged higher after tumbling on Thursday, when U.S. West Texas intermediate slid back below $110 per barrel after topping as much as $130 a barrel in recent sessions. Still, gas prices at the pump rose to fresh highs. "There are several million Russians who can lift their head up from propaganda and try to look for other sources, and I'd say that most look for it on Telegram," he said. In 2018, Russia banned Telegram although it reversed the prohibition two years later.
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