first, compare 6 and another 6. they must have difference.
2 j2 ~; {" q& ?1 K% |, u! _/ Ctvb now,tvbnow,bttvbsecond, divide those 6 heavier one into two, each has 3. u will find difference again.
( [# I* E. q4 q9 C3 |. H8 v; {tvb now,tvbnow,bttvbthird time, if u put 2 and they are equal, u will know the different one.- z. T0 M: ~3 M
so easy.... |