if len(L)>0:
max=L[0]
min=L[0]
for x in L:
if x > max:
max=x
elif x < min:
min =x
return (min,max)
return (None, None)
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轩辕泽霖
if len(L)>0:
max=L[0]
min=L[0]
for x in L:
if x > max:
max=x
elif x < min:
min =x
return (min,max)
return (None, None)