Question: 1. Given a list of n elements, ai, a2, ..., An, drawn from a totally ordered set. Present an O(n lg n)-time algorithm that counts

1. Given a list of n elements, ai, a2, ..., An, drawn from a totally ordered set. Present an O(n lg n)-time algorithm that counts the number of ordered pairs, (ai, a;), in the list such that i 2a
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