DSA · Theory

In place, convert BST into a Min-Heap

Theory

434/810

In place, convert BST into a Min-Heap

In place, convert BST into a Min-Heap sits in a file explorer. Vikram’s job is folder on disk. Write that first.

Do In place, convert BST into a Min-Heap once by hand. left < root < right. Change one input. Say the new result out loud.

Without In place, convert BST into a Min-Heap, a file explorer gets messy and folder on disk is hard to trust.

Use In place, convert BST into a Min-Heap when folder on disk must stay clear. If a simpler DSA step works, use that instead.

In place, convert BST into a Min-Heap trap: unbalanced BST becoming a list. Vikram loses marks for that every viva.

After In place, convert BST into a Min-Heap, Vikram should still remember unbalanced BST becoming a list.

Close In place, convert BST into a Min-Heap with: “If I skip it, folder on disk goes wrong like this: unbalanced BST becoming a list.”

Diagram

Exam tip

Say In place, convert BST into a Min-Heap in one breath, then left < root < right, then unbalanced BST becoming a list.

Example

import heapq

def heap_sort(arr):
    h = arr[:]
    heapq.heapify(h)
    return [heapq.heappop(h) for _ in range(len(h))]

print(heap_sort([5, 1, 4, 2]))

In place, convert BST into a Min-Heap — heap sort uses a binary heap to repeatedly extract the minimum.

Short notes

DefIn place, convert BST into a Min-Heap — Vikram uses it for folder on disk in a file explorer.
RuleIn place, convert BST into a Min-Heap → left < root < right.
RememberIn place, convert BST into a Min-Heap + Big-O (a file explorer).
UseIn place, convert BST into a Min-Heap in a file explorer (folder on disk).
TrapIn place, convert BST into a Min-Heap — unbalanced BST becoming a list.
ExIn place, convert BST into a Min-Heap → folder on disk.

DSA · Theory

In place, convert BST into a Min-Heap

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Theory

434/810

In place, convert BST into a Min-Heap

In place, convert BST into a Min-Heap sits in a file explorer. Vikram’s job is folder on disk. Write that first.

Do In place, convert BST into a Min-Heap once by hand. left < root < right. Change one input. Say the new result out loud.

Without In place, convert BST into a Min-Heap, a file explorer gets messy and folder on disk is hard to trust.

Use In place, convert BST into a Min-Heap when folder on disk must stay clear. If a simpler DSA step works, use that instead.

In place, convert BST into a Min-Heap trap: unbalanced BST becoming a list. Vikram loses marks for that every viva.

After In place, convert BST into a Min-Heap, Vikram should still remember unbalanced BST becoming a list.

Close In place, convert BST into a Min-Heap with: “If I skip it, folder on disk goes wrong like this: unbalanced BST becoming a list.”

Diagram

Exam tip

Say In place, convert BST into a Min-Heap in one breath, then left < root < right, then unbalanced BST becoming a list.

Example

import heapq

def heap_sort(arr):
    h = arr[:]
    heapq.heapify(h)
    return [heapq.heappop(h) for _ in range(len(h))]

print(heap_sort([5, 1, 4, 2]))

In place, convert BST into a Min-Heap — heap sort uses a binary heap to repeatedly extract the minimum.

Short notes

DefIn place, convert BST into a Min-Heap — Vikram uses it for folder on disk in a file explorer.
RuleIn place, convert BST into a Min-Heap → left < root < right.
RememberIn place, convert BST into a Min-Heap + Big-O (a file explorer).
UseIn place, convert BST into a Min-Heap in a file explorer (folder on disk).
TrapIn place, convert BST into a Min-Heap — unbalanced BST becoming a list.
ExIn place, convert BST into a Min-Heap → folder on disk.

In place, convert BST into a Min-Heap

Example

Short notes

Questions

In place, convert BST into a Min-Heap

Example

Short notes

Questions