Question: Design a simple algorithm divide-and-conquer (recursive) which takes an array A[1], ..., A[n] of integers as input, and decides whether these n numbers are all

Design a simple algorithm divide-and-conquer (recursive) which takes an array A[1], ..., A[n] of integers as input, and decides whether these n numbers are all (pairwise) different or not.

For example consider n = 3: the answer to (3, -1, 6) is "yes" (we have three different numbers), the answer to (1, 2, 1) is "no" (the first and third number are equal).

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