first, compare 6 and another 6. they must have difference.
( F3 t' t; O1 k# E2 M8 @& { S公仔箱論壇second, divide those 6 heavier one into two, each has 3. u will find difference again.tvb now,tvbnow,bttvb' y$ ~9 @$ a8 q& P- ~
third time, if u put 2 and they are equal, u will know the different one.
( Z! X% m9 `# S& p# C3 btvb now,tvbnow,bttvbso easy.... |