①处应填( )
a[i]<=b[i]
a[i]<b[i]
a[i]*0.95<=b[i]
a[i]*0.95<b[i]
②处应填()
total a>=threshold
total a>=total b
total b>=threshold
total a<total b
③处应填()
j+a[i]
total b-a[i]
total a+j+a[i]
total b-total b prefix
④处应填()
total b-total b prefix
f[j]+total a-total b
total a-total b prefix
f[j]+total b-total b prefix
⑤处应填()
f[j-a[i]]+b[i]
f[j-b[i]]+a[1]
f[j-a[i]]
f[j-b[i]]
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