title: Is it possible to directly access a position (not a key) in a multimap
body: <p><strong>Question:</strong> How do you access a value at a specified position in a key range without loops?
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  The only possible way I know to acquire this data is by incrementing the iterator however many times the position is from the beginning or end of a key range.
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  <p><em><strong>edit</em></strong> The reason I am reluctant in using loops is to reduce processing time by getting the wanted value when the values position in an index is known.</p>