i find one solution that is similar
]8 s B0 v; ~8 rbut 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,bttvb: L* p* n m& e% ~+ L. c9 z2 k% T8 Z% M
maybe there is a better one, let me see sin |