first, compare 6 and another 6. they must have difference. 公仔箱論壇# r$ Z3 i ]) X ]1 A$ A# B, r% v
second, divide those 6 heavier one into two, each has 3. u will find difference again.tvb now,tvbnow,bttvb; a' d6 e" U4 G. ~0 Q
third time, if u put 2 and they are equal, u will know the different one.$ R3 Z* I1 J: V* s4 H
so easy.... |