def findMinAndMax(L):
if L==[]:
return(None,None)
maxl=L[0]
for x in L: #求最大值
if x>= maxl:
maxl=x
minl=L[0]
for x in L:#求最小值
if x<= minl:
minl=x
return(minl,maxl)
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北方从何而来
def findMinAndMax(L):
if L==[]:
return(None,None)
maxl=L[0]
for x in L: #求最大值
if x>= maxl:
maxl=x
minl=L[0]
for x in L:#求最小值
if x<= minl:
minl=x
return(minl,maxl)