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  1. Prepare
  2. Python
  3. Sets
  4. The Captain's Room
  5. Discussions

The Captain's Room

  • Sinyuko
     + 0 comments
    k = int(input())
room_no = input().split()
room_no = sorted(room_no)
c_room = set(room_no[1::2]) ^ set(set(room_no[0::2]))
print(c_room.pop())