first, compare 6 and another 6. they must have difference.
V. H5 M( W0 {- O6 k公仔箱論壇second, divide those 6 heavier one into two, each has 3. u will find difference again.% r& c# ]- W2 Q& U
third time, if u put 2 and they are equal, u will know the different one.5.39.217.778 ^9 H. u/ `* E7 C, z% L5 @
so easy.... |