4 lines
136 B
APL
4 lines
136 B
APL
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tree←1(2(4(7⍬⍬)⍬)(5⍬⍬))(3(6(8⍬⍬)(9⍬⍬))⍬)
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visit←{⍺,(×≢⍵)⍴⊃⍵}
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children←{⊂¨@(×∘≢¨)1↓⍵}
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