Data structure supporting the following operations

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Published on 2013-11-06T01:44:24Z Indexed on 2013/11/06 4:16 UTC
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I'm looking for a data structure for working with a set of data which is most efficient to do the following :

Check whether an item has been categorized or not. (The categorized and uncategorized set are disjoint sets).
Get the category of an item.
Get all the items in a particular category.
Get all the uncategorized items.
Remove a particular item from the data set.

I was thinking of having a Dictionary<String, Set<String>> to hold all the items in a given category, but that doesn't solve 2.

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Data structure supporting the following operations - Developer IT

Data structure supporting the following operations

data-structures

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