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Leetcode 3362. Zero Array Transformation III | Greedy + Heap Solution Explained! | Leetcode 3362

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In this video, we solve Leetcode 3362: Zero Array Transformation III (also known as maxRemoval), a challenging greedy problem involving priority queues (heaps).
🧠 Problem Summary:
You are given an array of positive integers. At each index i, you can apply operations defined by queries [start, end]. Each operation can decrease nums[i] by 1 if i is in the range. Determine the maximum number of queries that can be unused while still reducing the array to all zeros.
🔥 Key Concepts Covered:
Greedy strategy to minimize used queries
Difference array for efficient range tracking
Using max heap (priority queue) to always choose optimal queries
Python implementation with detailed explanation
🛠 Tools Used: Python 3, Heapq, Greedy Algorithm
#Leetcode3362 #maxRemoval #ZeroArrayTransformation #GreedyAlgorithms #HeapInPython #LeetcodeExplained
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🧠 Problem Summary:
You are given an array of positive integers. At each index i, you can apply operations defined by queries [start, end]. Each operation can decrease nums[i] by 1 if i is in the range. Determine the maximum number of queries that can be unused while still reducing the array to all zeros.
🔥 Key Concepts Covered:
Greedy strategy to minimize used queries
Difference array for efficient range tracking
Using max heap (priority queue) to always choose optimal queries
Python implementation with detailed explanation
🛠 Tools Used: Python 3, Heapq, Greedy Algorithm
#Leetcode3362 #maxRemoval #ZeroArrayTransformation #GreedyAlgorithms #HeapInPython #LeetcodeExplained
—
🏷️ Tags
zero array transformation III, leetcode 3362, maxremoval problem, greedy heap leetcode, priority queue leetcode, heap based greedy, leetcode heap problem, range query leetcode, leetcode zero array, heap and greedy, greedy algorithm python, python heapq, zero array max removal, difference array python, leetcode greedy solution, greedy priority queue, range operation leetcode, leetcode heap approach, zero array transformation explained
—
🔑 Keywords (
zero array transformation
zero array transformation III
maxRemoval problem
leetcode 3362
greedy + heap
range queries
difference array
range updates
range decrement
greedy strategy
priority queue
heapq in python
python heap
max heap
range operation
zeroing array
reduce array to zero
efficient range updates
minimum queries
unused operations
greedy optimization
query sort
query interval
heap strategy
python data structures
python greedy
range processing
leetcode hard array
difference array python
heap with intervals
interval greedy
max heap solution
use less operations
unused queries count
greedy + diff array
max heap greedy
array transformation
interval selection
python interval heap
heap logic
operation minimization
efficient algorithm
decrement operations
python coding walkthrough
dry run array
step-by-step solution
explanation with heap
zero target array
greedy intuition
heap selection logic
greedy plus queue
optimal operations
apply less queries
diff array strategy
segment manipulation
coding best practices
python walkthrough
optimize removals
remove minimal
transformation greedy
heap greedy strategy
leetcode python tips
zero with heap
difference trick
array interval trick
operation tracking
zero with difference array
heap vs brute force
sort queries
greedy heap logic
maximum queries unused
reduce with intervals
greedy and efficient
heap push pop
condition based greedy
leetcode tricks
range based greedy
query pruning
query filtering
query processing
heap condition
interval control
minimize effort
reduce query usage
efficient zeroing
python efficiency
data structure mix
python sorting
range sort and process
leetcode top down
greedy coding
greedy decision making
zero using heaps
heap coding
python optimization
array state update
query impact
heap assisted greedy
range frequency
in-place tracking
greedy transformation
difference usage
optimized array zero
optimize operation path
optimal interval selection
minimal operation path
segment handling
interval optimizer
heap based decisions
greedy coding question
hard level leetcode
zeroing efficiently
heap mechanics
range logic
query effectiveness
diff + heap combo
priority greedy
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