def findMinAndMax(L): if L==[]: return(None,None) else: a0=a1=L[0]
#print(L[0]) for x in L: if a0<x: a0=x if a1>x: a1=x return(a1,a0)
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大牛201601
def findMinAndMax(L): if L==[]: return(None,None) else: a0=a1=L[0]