def findMinAndMax(L):
if len(L)==0:
return None,None
else:
max=min=L[0]
for i in L:
if max<i:
max=i
if min>i:
min=i
return min,max
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def findMinAndMax(L):
if len(L)==0:
return None,None
else:
max=min=L[0]
for i in L:
if max<i:
max=i
for i in L:
if min>i:
min=i
return min,max