if not L:
return (None,None)
else:
Min=Max=L[0]
for i in L:
if i < Min:
Min = i
if i > Max:
Max = i
return Min,Max
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拜托快给我药这是病得治
if not L:
return (None,None)
else:
Min=Max=L[0]
for i in L:
if i < Min:
Min = i
if i > Max:
Max = i
return Min,Max