N a unit of capacity used for measuring fresh herring, equal to 37.5 gallons 鲱斗; 鲱鱼计量单位
It came from the story in the 5th century B. C. how a herald named Phidippides ran the 26 miles from Marathon to Athens to announce the Greek victory and died on the spot.
它起源于公元前5世纪雅典长跑运动员费迪皮迪兹的故事,他以传令官的身份从马拉松到雅典跑了26英里宣告希腊在战争中的胜利,最后却牺牲生命。
He still incurred -C because he ran and he also has a cost of |x-y| because he doesn't like Mr. Y winning.
他同样有-C的收益因为他参加了竞选,且他还有|x-y|的成本,因为他不喜欢Y先生获胜
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