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  1. Prepare
  2. Python
  3. Sets
  4. No Idea!
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No Idea!

  • pdaxzuniga1
     + 0 comments

    For future reference: Do not cast the full main list of objects as a set. Using a list is necessary to maintain the integrity of the count, including duplicates.

    n, l = input(), list(map(int, input().split()))
a, b = set(map(int, input().split())), set(map(int, input().split()))
print(len([x for x in l if x in a]) - len([x for x in l if x in b]))