JotD / QotD Ελληνική Λίστα Κουίζ (QotD)


Θέμα: U2 's concert ...



(nil): Chris Georgiou. (cv94063(@)central.ntua.gr)
Ημερομηνία: Κυρ 10 Ιαν 1999 - 22:41:46 EET

This is one of the questions for potential Microsoft employees. I must warn
you, you can really get caught up trying to solve this problem.
Reportedly, one guy solved it by writting a C program, although that took
him 37 minutes to develop (compiled and ran on the 1st try though). Another
guy solved it in three minutes. A group of 50, at Motorola, couldn't figure
it out at all. See how long it takes you .

Here we go ....

"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 to 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 1 or 2 people, must have the flashlight with
them. The flashlight must bewalked 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 : - 1 minute 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.

Notes : There is no trick behind this. It is the simple movement of
resources in the appropriate order.
There are two known answers to this problem.

This is based on a question Microsoft gives to all prospective employees.
Note : Microsoft expects you to answer this question in under 5 minutes !

Good Luck !

Chris' note : Whoever knows something about the answer, just mail it to me.
                  It seems that I'm not made to be a Microsoft employee.

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