There are 1 1 apples, one of which has a different weight. Give you a balance. How can I find it within three times?

1. Compare ABC and DEF

1. 1 If ABC=DEF, compare Ag and Hi.

1. 1. 1 if AG=HI, compare a and j.

1.1.11if A=J, it is k.

1. 1. 12 if A≠J, it is j.

1. 1.2 if Ag >；; Hey, compare h, i.

1. 1.2 1 g if h = i.

1. 1.22 if h >；; Me, it's me.

1. 1.23 if h

1. 1.3 If silver

1. 1.3 1 g if h = i.

1. 1.32 if h >；; I'm H.

1. 1.32 if h

1.2 If ABC & gtDEF, compare AB, DG.

1.2. 1 If AB=DG, compare E and F.

1.2. 1 1 c if e = f.

1.2. 12 if E>f, it is F.

1.2. 13 if e

1.2.2 if AB & gtDG, compare a and b.

1.2.2 1 if A=B, it is d.

1.2.22 if A>b, it is a.

1.2.23 if a

1.2.3 If AB

1.3 If ABC