N elevators serving M floors most efficiently

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Loren Booda
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What kind of algorithm aptly describes the solution to this problem?
 
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Would you want to take into account that the bottom floor will be used most often therefore at least one elevator should idle there when not in use?
 
A good constraint for a variable minimum N vs a variable maximum M.
 
Oh right, I don't think I will be able to help with this question but I think that you will need another variable for how many people use the elevators.
 
Assume that the floors above ground are called at random.
 
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