first, compare 6 and another 6. they must have difference.
; g' y: B* U) l" c: f2 X公仔箱論壇second, divide those 6 heavier one into two, each has 3. u will find difference again.& q7 w1 v) m' o' F
third time, if u put 2 and they are equal, u will know the different one.
) o/ W; p1 ^7 dtvb now,tvbnow,bttvbso easy.... |