一條勁難ga數學IQ題!!(半個鍾內諗到係天才)

愛．小廢∼＊

note that
log₃12 = 2.2618595... < 3
log₂12 = 3.5849625... > 3

.'. 每次一定要分3份

Let the balls be a, b, c, d, .... l
一開波 4v4.. (abcd vs efgh)
├abcd = efgh
│├ij > ak ('.'對稱性)
││├i > j -> ANS: i
││├i = j -> ANS: k
││└i < j -> ANS: j
│└ij = ak -> ANS: l
└abcd > efgh ('.'對稱性)
　├abe > cfi
　│├a > b -> ANS: a
　│├a = b -> ANS: f
　│└a < b -> ANS: b
　├abe = cfi
　│├d > g -> ANS: d
　│├d = g -> ANS: h
　│└d < g -> ANS: g
　└abe < cfi
　　├c > i -> ANS: c
　　└c = i -> ANS: e