i find one solution that is similar / c& ^: o, j* j$ \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 t. w4 y1 q/ i$ vmaybe 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...