DSA · Theory

LEFTIST TREE / LEFTIST HEAP

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Theory

485/810

LEFTIST TREE / LEFTIST HEAP

Don’t start LEFTIST TREE / LEFTIST HEAP with jargon. Start with folder on disk. That is the whole point.

LEFTIST TREE / LEFTIST HEAP order — meaning → left < root < right → one limit. Dumping ten features helps nobody.

Without LEFTIST TREE / LEFTIST HEAP, a file explorer gets messy and folder on disk is hard to trust.

Use LEFTIST TREE / LEFTIST HEAP when folder on disk must stay clear. If a simpler DSA step works, use that instead.

LEFTIST TREE / LEFTIST HEAP trap — unbalanced BST becoming a list. Rohit loses marks for that every viva.

Place LEFTIST TREE / LEFTIST HEAP next to nearby DSA work — left < root < right is the link.

One breath for LEFTIST TREE / LEFTIST HEAP, then folder on disk, then unbalanced BST becoming a list. Sit down.

Exam tip

For LEFTIST TREE / LEFTIST HEAP: definition + a file explorer + one failure.

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]))

LEFTIST TREE / LEFTIST HEAP — heap sort uses a binary heap to repeatedly extract the minimum.

Short notes

DefLEFTIST TREE / LEFTIST HEAP — Rohit uses it for folder on disk in a file explorer.
RuleLEFTIST TREE / LEFTIST HEAP → left < root < right.
RememberLEFTIST TREE / LEFTIST HEAP + a dry-run table (a file explorer).
UseLEFTIST TREE / LEFTIST HEAP in a file explorer (folder on disk).
TrapLEFTIST TREE / LEFTIST HEAP — unbalanced BST becoming a list.
ExLEFTIST TREE / LEFTIST HEAP → folder on disk.

DSA · Theory

LEFTIST TREE / LEFTIST HEAP

← All stacks

Theory

485/810

LEFTIST TREE / LEFTIST HEAP

Don’t start LEFTIST TREE / LEFTIST HEAP with jargon. Start with folder on disk. That is the whole point.

LEFTIST TREE / LEFTIST HEAP order — meaning → left < root < right → one limit. Dumping ten features helps nobody.

Without LEFTIST TREE / LEFTIST HEAP, a file explorer gets messy and folder on disk is hard to trust.

Use LEFTIST TREE / LEFTIST HEAP when folder on disk must stay clear. If a simpler DSA step works, use that instead.

LEFTIST TREE / LEFTIST HEAP trap — unbalanced BST becoming a list. Rohit loses marks for that every viva.

Place LEFTIST TREE / LEFTIST HEAP next to nearby DSA work — left < root < right is the link.

One breath for LEFTIST TREE / LEFTIST HEAP, then folder on disk, then unbalanced BST becoming a list. Sit down.

Exam tip

For LEFTIST TREE / LEFTIST HEAP: definition + a file explorer + one failure.

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]))

LEFTIST TREE / LEFTIST HEAP — heap sort uses a binary heap to repeatedly extract the minimum.

Short notes

DefLEFTIST TREE / LEFTIST HEAP — Rohit uses it for folder on disk in a file explorer.
RuleLEFTIST TREE / LEFTIST HEAP → left < root < right.
RememberLEFTIST TREE / LEFTIST HEAP + a dry-run table (a file explorer).
UseLEFTIST TREE / LEFTIST HEAP in a file explorer (folder on disk).
TrapLEFTIST TREE / LEFTIST HEAP — unbalanced BST becoming a list.
ExLEFTIST TREE / LEFTIST HEAP → folder on disk.

LEFTIST TREE / LEFTIST HEAP

Example

Short notes

Questions

LEFTIST TREE / LEFTIST HEAP

Example

Short notes

Questions