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12325 Zombie’s Treasure Chest Some brave warriors come to a lost village. They are very lucky and find a lot of treasures and a big treasure chest, bu 阅读全文
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Description Everyone knows what the Fibonacci sequence is. This sequence can be defined by the recurrence relation: F1 = 1, F2 = 2, Fi = Fi - 1 + Fi - 阅读全文
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Description Every year the cows hold an event featuring a peculiar version of hopscotch that involves carefully jumping from rock to rock in a river. 阅读全文