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Problem Description Here N (N ≥ 3) rabbits are playing by the river. They are playing on a number line, each occupying a different integer. In a singl 阅读全文
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Problem Description Little boxes on the hillside. Little boxes made of ticky tacky. Little boxes. Little boxes. Little boxes all the same. There are a 阅读全文
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Olya loves energy drinks. She loves them so much that her room is full of empty cans from energy drinks. Formally, her room can be represented as a fi 阅读全文