first, compare 6 and another 6. they must have difference.
' E Y) u- z& }8 E$ [second, divide those 6 heavier one into two, each has 3. u will find difference again.tvb now,tvbnow,bttvb; i2 X: Y) @( H: ~" r" P2 k* J8 U
third time, if u put 2 and they are equal, u will know the different one.tvb now,tvbnow,bttvb) w4 Q; c! R8 U2 h9 A
so easy.... |