>>>Vlad,
>>>
>>>Do you happen to know if there is some kind of ugly curve at the point the trains meet :) ? If so, does the answer depend on strait distance or the rail distance? I think the question can be worse than spending only one hour to solve :D
>>>
>>
>>Isn't the answer obvious? Or, perhaps just to me... If a trian traveling from Montreal to Toronto meet a train traveling the opposite direction, The train traveling from Montreal will be closer to Montreal and the train traveling from Toronto will be closer to Toronto... since, where the trains meet the trains would be at the same point, but, each train would be closer to it's point of origin than the other train by the length of that train.
>>
>>BOb
>
>
>Bob,
>
>You gave the right answer Vlad wants you to make -- I agree whole heartly :),
>but, if the train from Toronto takes a sharp turn, say to go arround a montain, so that it travles actually towards Toronto for a while, and the two trains meet there. If you measure the strait distance, you end up to find that the train from Montreal is closer to Toronto. So, the 'obvious' correct answer is only conditional. Without enough facts I need to sovle the problem, I admit I will need one hour or more :)))
>
>Chen

Well, it's true then that the 'correct' answer to every programming question is....

IT DEPENDS

BOb