i find one solution that is similar* H' U ?% S) {' Z
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.... 9 ~+ @" }2 r: J2 O: j" B9 d公仔箱論壇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...