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dingyb (江南风灵) 于 (Tue Jun 20 17:49:25 2006) 提到:
A drunken man is on a 100 meter long bridge at the 17 meter position. He has a
50% chance of staggering forward and backward one meter per step. What is the
probability he will make it to the end of the bridge before the beginning?
Assume he takes one step per second, how long is he going to stay on the
bridge?
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diphontine (Hello World) 于 (Tue Jun 20 18:43:04 200
