DSA · Theory

Boundary Traversal of Binary tree

Theory

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Boundary Traversal of Binary tree

Boundary Traversal of Binary tree sits in a file explorer. Rohit’s job is folder on disk. Write that first.

Boundary Traversal of Binary tree order — meaning → left < root < right → one limit. Dumping ten features helps nobody.

Boundary Traversal of Binary tree exists so Rohit can keep folder on disk correct in a file explorer.

Rohit ships Boundary Traversal of Binary tree in a file explorer. That is the use case worth saying.

Boundary Traversal of Binary tree miss — unbalanced BST becoming a list. Fix it before you talk about advanced DSA.

Boundary Traversal of Binary tree is not a lonely heading. Rohit ties it to folder on disk.

Viva for Boundary Traversal of Binary tree: what it is → left < root < right → the mistake (unbalanced BST becoming a list).

Exam tip

Board: folder on disk. Dry-run Boundary Traversal of Binary tree. Name the trap: unbalanced BST becoming a list.

Example

class Node:
    def __init__(self, val, left=None, right=None):
        self.val, self.left, self.right = val, left, right

def inorder(n):
    if not n:
        return []
    return inorder(n.left) + [n.val] + inorder(n.right)

root = Node(2, Node(1), Node(3))
print(inorder(root))

Boundary Traversal of Binary tree — inorder walks left → node → right (sorted order for a BST).

Short notes

DefBoundary Traversal of Binary tree — Rohit uses it for folder on disk in a file explorer.
RuleBoundary Traversal of Binary tree → left < root < right.
RememberBoundary Traversal of Binary tree + time vs memory (a file explorer).
UseBoundary Traversal of Binary tree in a file explorer (folder on disk).
TrapBoundary Traversal of Binary tree — unbalanced BST becoming a list.
ExBoundary Traversal of Binary tree → folder on disk.

class Node: def __init__(self, val, left=None, right=None): self.val, self.left, self.right = val, left, right def inorder(n): if not n: return [] return inorder(n.left) + [n.val] + inorder(n.right) root = Node(2, Node(1), Node(3)) print(inorder(root))

Boundary Traversal of Binary tree

Example

Short notes

Questions

Boundary Traversal of Binary tree

Example

Short notes

Questions