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Tree Traversal

Tree Traversal. Traversal Algorithms. preorder inorder postorder. PreOrder Traversal. Inorder Traversal. Postorder Traversal. In which order does a inorder traversal visit the vertices in this ordered rooted tree?. procedure inorder ( T : ordered rooted tree) r := root of T

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Tree Traversal

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  1. Tree Traversal

  2. Traversal Algorithms • preorder • inorder • postorder

  3. PreOrder Traversal

  4. Inorder Traversal

  5. Postorder Traversal

  6. In which order does a inorder traversal visit the vertices in this ordered rooted tree? procedureinorder(T: ordered rooted tree) r := root of T if r is a leaf then list r else begin l:= first child of r from left to right T(l) := subtree with l as its root inorder(T(l)) list r for each child c of r except for l left to right T(c) := subtree with c as its root preorder(T(c)) end output: j e n k o p b f a c l g m d h i

  7. In which order does a postorder traversal visit the vertices in this ordered rooted tree?

  8. Infix, Prefix, and Postfix Notation represent complicated expressions using an ordered rooted tree (typically binary) • Algebraic expressions • preorder – Polish notation • inorder – infix notation • postorder – reverse Polish notation

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