import copy from functools import reduce a = [1, 3, 5, 7, 9, 13, 15] b = [4, 5, 6, 8, 13] c = [5, 8, 13, 19] def get_common_factors(a, b, res=[]): _res = copy.deepcopy(res) if a and b: if a[0] == b[0]: _res.append(a[0]) a.pop(0) b.pop(0) else: target = min(a, b, key=lambda x: x[0]) target.pop(0) return get_common_factors(a, b, _res) else: return res def get_multiple_factors(arr): return reduce(lambda x, y: get_common_factors(x, y), arr) res = get_multiple_factors([a, b, c]) print(res)
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