2583. Kth Largest Sum in a Binary Tree | LeetCode 2583 Explained in Java |Code Explanation & Dry Run

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🚀 2583. Kth Largest Sum in a Binary Tree | LeetCode Medium Problem Solution Explained 🚀

In this video, we’ll break down and solve LeetCode problem 2583: Kth Largest Sum in a Binary Tree step by step! 🎯 This is a Medium-level problem that requires understanding of binary trees, breadth-first search (BFS), and sorting techniques to find the level sums.

🔍 Problem Summary:
You are given the root of a binary tree and a positive integer k. The task is to calculate the sum of node values at each level of the tree, and return the kth largest level sum. If there are fewer than k levels in the tree, return -1.

We’ll go through the following steps:

Understanding the Problem Statement ✅
Breadth-First Search (BFS) Traversal of Binary Tree 🌳
Calculating Level Sums and Finding the Kth Largest 📊
Edge Cases to Watch Out For ⚠️
Time and Space Complexity Analysis ⏲️
🧠 Concepts Covered:
Binary Tree 🌲
Breadth-First Search (BFS) 🔄
Sorting in Descending Order 🔢
📘 Code Walkthrough:
We’ll write the solution in Java, using BFS for level-order traversal and a sorted list to determine the kth largest level sum. 📈 Time & Space Complexity:
We’ll also discuss the time complexity of our approach (O(n Llog L) in the worst case) and the space complexity (O(n)).

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Awesome video! I solved the problem right after watching it. Your teaching style really helps me grasp difficult concepts!

preetiverma

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