215. Kth Largest Element in an Array | Java | Leetcode | Priority Queue | DSA
In this video, we solve LeetCode Problem 215 – Kth Largest Element in an Array with a step-by-step explanation, dry run, and Java solution using different approaches. 🔥
🔍 Problem Statement:
Given an integer array nums and an integer k, return the k-th largest element in the array.
Note: It is the k-th largest element in sorted order, not the k-th distinct element.
✅ What you’ll learn in this video:
Intuition and step-by-step approach
Min-Heap (Priority Queue) solution explained
Sorting-based approach comparison
Full Java code implementation
Time and space complexity breakdown
📊 Example:
Input: nums = [3,2,1,5,6,4], k = 2
Output: 5
Explanation: The sorted array is [1,2,3,4,5,6] → 2nd largest is 5.
🧠 Concepts Used:
Heap / Priority Queue
Sorting
Top-K Elements pattern
💡 This is one of the most frequently asked questions in coding interviews — mastering it will help you solve many Top-K problems easily.
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