A puzzle problem

[sysopp (知足惜福)]

　在書上看到的問題：

You are a hero with a broken sword (Conan, Boromir, or your favorite Dungeons
and Dragons character) being chased by a troop of bad guys (bandits, orcs, .
. .). Fortunately you are on a horse and they are not. Unfortunately your
horse is tired and they will eventually run you down. Fortunately you have a
bow. Unfortunately you have only ten arrows. Fortunately, being a hero, you
never miss. Unfortunately there are 40 bad guys. The bad guys are strung out
behind you, as shown.

Problem: Use economics to get away.

Note: You cannot talk to the bad guys. They are willing to take a substantial
chance of being killed in order to get you--after all, they know you are a
hero and are still coming. They know approximately how many arrows you have.

　簡易翻成中文應該是：

　　你是一位英雄，帶有一把已受損的劍，而且正被一群壞人追趕

　　幸運的是，你有一匹馬，而他們沒有

　　不幸的是，你的馬已疲累不堪終究會倒下

　　幸運的是，你有弓

　　不幸的是，你只有十隻箭

　　幸運的是，你是一位英雄，永不會射偏

　　不幸的是，對方有四十個人

　　壞人們正追趕著你

　問題： 用經濟觀點逃走

　注意：

　　你不能和壞人們交談

　　壞人們願冒死以求逮捕到你

　　畢竟，壞人們知道你是英雄且你也會殺死他們

　　壞人們知道你大約有多少隻箭
　
　想知道可以怎麼去思考

　

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推 kyova:查google就有答案喔 這問題還真有趣
推 amei:可惡!!可以煩請告知關鍵字是什麼嗎 >"<