Divide 3 groups first.
: k# H3 i6 S( h0 n3 _2 C5.39.217.77:8898i.e. 4 x 4 x 4.
. t1 {2 e# J) G9 IWeight any 2 groups [1st]
1 H2 o) {# O W; k# sthen you will know the heavier ball in which group." t% t: o- A* Z- X" H e. Q7 w
Weight any 2 balls in that group [2nd]5.39.217.77:8898+ D& ]1 S/ n6 q* v
then you will know the heavier ball in which 2 balls.
9 q' S' ~4 u; eRepeat again in remainders [3rd]
7 o" L# Y1 X9 G5 A; JGot the heavier ball. |
發表於 2009-7-2 12:48 PM
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