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不知道
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Divide 3 groups first.公仔箱論壇7 \* g# p- v2 H& c1 \* E& {" Z) t7 L
i.e. 4 x 4 x 4.公仔箱論壇# T' n! W2 Y) v- P
Weight any 2 groups [1st]: Y$ ?; \& ^" m' M, B1 |6 e9 }
then you will know the heavier ball in which group.5.39.217.76( X- v0 k; A  i5 _3 f8 }
Weight any 2 balls in that group [2nd]' z$ ^8 W, i6 F4 v# W9 G" l
then you will know the heavier ball in which 2 balls.
1 Y6 {3 @: N/ O; h; Stvb now,tvbnow,bttvbRepeat again in remainders [3rd]
' @7 k& Y& K1 N5 J0 |0 B- i% z- XGot the heavier ball.
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我知道
so easy
easy only 1 min done
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