we do a little trolling
Suppose we have the following toy binary tree structure: datatype Tree = Leaf | Branch of Tree * Tree fun left(Branch(l,r))= l fun right(Bra
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seen from Singapore
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seen from China

seen from United States
seen from United States
seen from China

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seen from United Kingdom

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seen from United States

seen from United States
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we do a little trolling
Suppose we have the following toy binary tree structure: datatype Tree = Leaf | Branch of Tree * Tree fun left(Branch(l,r))= l fun right(Bra