There were 12 small balls of 12 properties, including bad (weight and unique), give a flat, only 3 times, and find bad balls. . . . ! ~
1: Take 8 Tianping four, equal words, it is easy (there is a problem in the remaining four), otherwise the second step 2: Balance is unbalanced, from the heavy side to put three simultaneous places Three no problems, and at the same time, there is no change in this side of this side, and there is one of the balances, and there will be three situations: (1) If the balance is maintained, The heavy side is also heavy, launching problems with the three balls that have not been changed before, and there is a light, and the remaining time is easy. . . (2) If the balance is in turn, the light is heavy, it is only because it is a heavy ball or changed it is a light ball, and the problem is in these two balls. The remaining one can be said (3) If the balance is balanced, there is a problem with the three balls that have been changed from heavy, there is a heavy ball, and the rest can be done. . . .
