【問題】U2樂團


訪客 joaneyaya

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訪客 joaneyaya

問題原文

U2 has a concert that starts in 17 minutes and they must all cross a bridge to get there. All four men begin on the same side of the bridge. You must help them across the stage on the other side. It is night. There is one flashlight. A maximum of two people can cross at one time. Any party who crosses, either one or two people, must have the flashlight with them. The flashlight must be walked back and forth; it cannot be thrown, etc. Each band member walks at a different speed. A pair must walk together at the rate of the slower man's pace:

Bono: 1minute to cross

Edge: 2 minutes to cross

Adam: 5 minutes to cross

Larry: 10 minutes to cross

For example, if Bono and Larry walk across first, 10 minutes have elapsed when they get to the other side of the bridge. If Larry then returns with the flashlight, a total of 20 minutes have passed and you have failed the mission.

所以基本上是這樣的...U2樂隊有一個演唱會在17分鐘後開始,,他們都必須跨橋到他們演出的地方。所有四名男子開始站在橋樑的一邊。你必須幫助他們越過橋樑的另一邊的舞台上。這是夜晚,只有一個手電筒。同一時間最多只能有兩個人在橋上。無論是一個或兩個人,必須有手電筒穿越橋。該手電筒必須回到橋頭,不能用扔的,每一個樂團成員走路的速度不一樣,要依最慢的那個人為穿越的時間

Bono: 1分鐘到橋的另一邊

Edge: 2 分鐘到橋的另一邊

Adam: 5 分鐘到橋的另一邊

Larry: 10 分鐘到橋的另一邊

舉例來說,如果Bono和Larry先走到演唱會場地,10分鐘就過去了,如果拉里拿著手電筒回去,一共就20分鐘過去了...

幫幫忙吧~數學老師出的題...

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訪客 joaneyaya

我來解答吧...

基本上就是:

Bono&Edge go (2min)

Adam & Larry stay---------------------------------------------->

Bono back (1 min)

Adam & Larry <-------------------------------------------- Edge stay here

Adam&Larry go(10min)

Bono stay here ----------------------------------------------> Edge

Edge back (2min)

Bono <-------------------------------------------- Adam&Larry

Bono&Edge go (2min)

---------------------------------------------->Adam&Larry

這樣total剛好17min...

上面的那個可能算錯了...

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