i find one solution that is similar
) X }+ @9 v4 e" \5 Z5 Zbut i can't specify the heavier one is abnormal or the lighter one is abnormal when the case that has only two balls left....tvb now,tvbnow,bttvb1 I9 Y3 i4 w& @+ A' E& E
maybe there is a better one, let me see sin |