if len(L) == 0: return (None, None) max=L[0] min=L[-1] for a in L: if(a>max): max=a if(a<min): min=a return (min, max) if findMinAndMax([]) != (None, None): print('11测试失败!') elif findMinAndMax([7]) != (7, 7): print('22测试失败!') elif findMinAndMax([7, 1]) != (1, 7): print('33测试失败!') elif findMinAndMax([7, 1, 3, 9, 5]) != (1, 9): print('44测试失败!') else: print('测试成功!')
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