a=[30,10,20,11,12,50]
d=[0]*6 ; max=0 ; n=len(a)
for i in range(1,n):
for j in range(i):
if a[j]<a[i]:
d[i]+=1
if d[i]>max:
max=d[i]
执行程序后,变量max的值是( )
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