i find one solution that is similar
, E) u- x) I# u9 k9 \$ |- w3 Dbut i can't specify the heavier one is abnormal or the lighter one is abnormal when the case that has only two balls left....
6 B8 e+ V q( T! N. n) ftvb now,tvbnow,bttvbmaybe there is a better one, let me see sin |