[推理] 鬥魚
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魚缸裡目前有九隻魚,其中甲跟乙是兇猛的鬥魚,會吃掉比自己小的魚。
另外七隻小丑魚想活下來的話,必須團結起來一致對外。
只要有五隻小丑魚一起攻擊,即使是一隻再兇猛的鬥魚也會在幾分鐘內掛掉的。
可惜牠們目前魚數不夠,
只能用四隻來對付大一點的鬥魚甲,用三隻來對付較小的鬥魚乙,
那麼,最後的結局會是如何呢?
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