i find one solution that is similar公仔箱論壇% _0 B; P( Y* h1 Z) D' e5 _
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..../ |4 ^( g3 r+ p8 \. B/ ~: p
maybe there is a better one, let me see sin
actually this question always have someone asked, the calculation is very complicated, should give a no. of each ball, and first weight it in 6-6, and .... forgot...