Divide 3 groups first.$ |$ `: _( m. @5 h F
i.e. 4 x 4 x 4.tvb now,tvbnow,bttvb* \& V% L# [0 D3 ^% U9 g
Weight any 2 groups [1st]tvb now,tvbnow,bttvb7 E" G* ^. G( [& j, j* Q
then you will know the heavier ball in which group.8 y" e# c# e) v" J
Weight any 2 balls in that group [2nd]+ z. D+ E9 P" H) Z
then you will know the heavier ball in which 2 balls.
, Y" ]* ^* V, uRepeat again in remainders [3rd]
. B- M7 _: q5 Y+ {9 p+ m; U) Wtvb now,tvbnow,bttvbGot the heavier ball. |
發表於 2009-7-2 12:48 PM
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