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        riddles >> medium >> BRIDGE CROSSING -- is this right?
        
(Message started by: standsolid on Jan 3^rd, 2003, 3:25am)

Title: BRIDGE CROSSING -- is this right?
Post by standsolid on Jan 3^rd, 2003, 3:25am

i was looking over bridge crossing in med. and i though this was the correct answer, but it's kinda bugging me

If two people need to cross, then another needs to return with the flashlight. thus,

A & B = 2 min
A to Beginning = 1 min
A & C = 5 min
A to Beginning (again) 1 min
A & D = 10 min
add it all up to get 19 minutes. is that logical/correct?

Title: Re: BRIDGE CROSSING -- is this right?
Post by redPEPPER on Jan 3^rd, 2003, 4:01am

That's logical/correct but it's not the best solution (so it's not the answer to the problem). You can do 17 minutes.

Title: Re: BRIDGE CROSSING -- is this right?
Post by turambar386 on Apr 24^th, 2003, 11:42am

Got it!

A and B cross = 2 min
A goes back = 1 min
A gives flashlight to D and C and they cross = 10 min
D&C give flashlight to B and he goes back = 2 min
B & A cross = 2 min

Total 17 min.
Woot! Bring on the cushy M$ job!

Title: Re: BRIDGE CROSSING -- is this right?
Post by Icarus on Apr 24^th, 2003, 6:27pm

Working for MS? And I thought marrying your sister and killing all your friends was bad! ;)

Title: Re: BRIDGE CROSSING -- is this right?
Post by turambar386 on Apr 25^th, 2003, 6:27am

on 04/24/03 at 18:27:00, Icarus wrote:

Working for MS? And I thought marrying your sister and killing all your friends was bad! ;)

I'm kidding, naturally. I had a best friend who went to work for Microsoft. It's scary how they slowly brainwash their employees.