DSA · Theory

Mirror of n-ary Tree

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Theory

370/810

Mirror of n-ary Tree

Meera only reaches for Mirror of n-ary Tree when folder on disk has to stay correct in a file explorer.

Keep Mirror of n-ary Tree small. Meera should finish folder on disk in a few lines, not a 40-line dump.

Without Mirror of n-ary Tree, a file explorer gets messy and folder on disk is hard to trust.

Meera ships Mirror of n-ary Tree in a file explorer. That is the use case worth saying.

Don’t do this with Mirror of n-ary Tree — unbalanced BST becoming a list. Interviewers spot it in ten seconds.

Mirror of n-ary Tree is not a lonely heading. Meera ties it to folder on disk.

Viva for Mirror of n-ary Tree — what it is → left < root < right → the mistake (unbalanced BST becoming a list).

Exam tip

Say Mirror of n-ary Tree in one breath, then left < root < right, then unbalanced BST becoming a list.

Example

# Mirror of n-ary Tree
data = [4, 1, 3]
print("start", data)
if data[0] > data[1]:
    data[0], data[1] = data[1], data[0]
print("after one step", data)

Mirror of n-ary Tree: dry-run [4, 1, 3]. Say the list after one step.

Short notes

DefMirror of n-ary Tree — Meera uses it for folder on disk in a file explorer.
RuleMirror of n-ary Tree → left < root < right.
RememberMirror of n-ary Tree + Big-O (a file explorer).
UseMirror of n-ary Tree in a file explorer (folder on disk).
TrapMirror of n-ary Tree — unbalanced BST becoming a list.
ExMirror of n-ary Tree → folder on disk.

DSA · Theory

Mirror of n-ary Tree

← All stacks

Theory

370/810

Mirror of n-ary Tree

Meera only reaches for Mirror of n-ary Tree when folder on disk has to stay correct in a file explorer.

Keep Mirror of n-ary Tree small. Meera should finish folder on disk in a few lines, not a 40-line dump.

Without Mirror of n-ary Tree, a file explorer gets messy and folder on disk is hard to trust.

Meera ships Mirror of n-ary Tree in a file explorer. That is the use case worth saying.

Don’t do this with Mirror of n-ary Tree — unbalanced BST becoming a list. Interviewers spot it in ten seconds.

Mirror of n-ary Tree is not a lonely heading. Meera ties it to folder on disk.

Viva for Mirror of n-ary Tree — what it is → left < root < right → the mistake (unbalanced BST becoming a list).

Exam tip

Say Mirror of n-ary Tree in one breath, then left < root < right, then unbalanced BST becoming a list.

Example

# Mirror of n-ary Tree
data = [4, 1, 3]
print("start", data)
if data[0] > data[1]:
    data[0], data[1] = data[1], data[0]
print("after one step", data)

Mirror of n-ary Tree: dry-run [4, 1, 3]. Say the list after one step.

Short notes

DefMirror of n-ary Tree — Meera uses it for folder on disk in a file explorer.
RuleMirror of n-ary Tree → left < root < right.
RememberMirror of n-ary Tree + Big-O (a file explorer).
UseMirror of n-ary Tree in a file explorer (folder on disk).
TrapMirror of n-ary Tree — unbalanced BST becoming a list.
ExMirror of n-ary Tree → folder on disk.

Mirror of n-ary Tree

Example

Short notes

Questions

Mirror of n-ary Tree

Example

Short notes

Questions