def countOfElement(listInput1, listInput2): a = {} b = {} for num in listInput1: a[num] = a.get(num, e) + 1 for num in listInput2: b[num] = b.get (num, 0) + 1 ans = 0 for num, count in a.items(): if num not in b: ans += count for num, count in b.items(): if num not in a: ans += count return ans