DSA · Theory

Height of n-ary tree if parent array is given

Theory

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Height of n-ary tree if parent array is given (alt) sits in a file explorer. Dev’s job is folder on disk. Write that first.

Height of n-ary tree if parent array is given (alt) order: meaning → left < root < right → one limit. Dumping ten features helps nobody.

Height of n-ary tree if parent array is given (alt) exists so Dev can keep folder on disk correct in a file explorer.

Dev ships Height of n-ary tree if parent array is given (alt) in a file explorer. That is the use case worth saying.

Height of n-ary tree if parent array is given (alt) miss: unbalanced BST becoming a list. Fix it before you talk about advanced DSA.

Place Height of n-ary tree if parent array is given (alt) next to nearby DSA work — left < root < right is the link.

Close Height of n-ary tree if parent array is given (alt) with: “If I skip it, folder on disk goes wrong like this: unbalanced BST becoming a list.”

Diagram

  index →  0    1    2
  array → [10,  20,  30]

Exam tip

Say Height of n-ary tree if parent array is given (alt) in one breath, then left < root < right, then unbalanced BST becoming a list.

arr = [10, 20, 30, 40]
print(arr[2], arr[-1])
matrix = [[1, 2], [3, 4]]
print(matrix[1][0])  # 3

Height of n-ary tree if parent array is given (alt) — arrays give O(1) index access; matrices are arrays of arrays.

DefHeight of n-ary tree if parent array is given (alt) — Dev uses it for folder on disk in a file explorer.
RuleHeight of n-ary tree if parent array is given (alt) → left < root < right.
RememberHeight of n-ary tree if parent array is given (alt) + Big-O (a file explorer).
UseHeight of n-ary tree if parent array is given (alt) in a file explorer (folder on disk).
TrapHeight of n-ary tree if parent array is given (alt) — unbalanced BST becoming a list.
ExHeight of n-ary tree if parent array is given (alt) → folder on disk.