Manasa and Stones

Set

Set is an abstract data type that only stores unique elements. In C++ sets are implemented as a binary search tree and the elements can be accessed in a sorted order.

In Python sets are unordered.

In general, operation complexity in a set is as follows: 

insert : O(logn)
delete : O(logn)
lookup : O(logn)

In Python sets are mathematical sets which also support set difference and set intersection.

Sets have a varient Multiset that also stores multiple values.

Set ADT can be used in computations where you are dealing with unique elements.

 
Related challenge for Set

Unfriendly Numbers

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