i find one solution that is similar, N' I5 {5 A- F& r# s& 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.... 8 L6 U/ z0 [5 ^7 x( J; j2 emaybe 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...