i find one solution that is similar$ ~. F4 F/ {3 B# S. r4 ^/ Z2 e
but i can't specify the heavier one is abnormal or the lighter one is abnormal when the case that has only two balls left....
, E7 y" N! H+ `! ?, U! J. }公仔箱論壇maybe there is a better one, let me see sin |