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Array Pair Sum #8

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@normoes

This is about Array Pair Sum.ipynb in Array Sequence Interview Questions - PRACTICE. This notebook is part of lectures 53 and 54.

Though the notebook is located in the PRACTICE folder, I want to point out that the function returns an incorrect result for pair_sum([1,3,2,2],3).

  • The result of pair_sum([1,3,2,2],3) is 2.
  • The result of pair_sum([1,3,2,2],3) should be 1 since (1,2) appears twice ((1,2), (2,1)) but unique sums are searched for.

Maybe this should be added to the list of test cases.
Just to make sure all is clear and nobody gets the wrong idea while solving this problem.

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