import sys import math def solu_dfs(l1, l2, data, cha): if len(data) == 0 : # print(l1, l2) if math.fabs( sum(l1) - sum(l2) ) == cha : return True else : return False return solu_dfs(l1 + [data[0]], l2, data[1:], cha) or solu_dfs(l1, l2 + [data[0]], data[1:], cha) def solu2(l1, l2, data, target): if...