2583. Kth Largest Sum in a Binary Tree | Queue | Sorting | O(N) | LeetCode | Medium | Binary Tree
In this video, we go over the C++ solution to the problem 2583. Kth Largest Sum in a Binary Tree. This algorithm efficiently calculates the sum of node values at each level of a binary tree and finds the k-th largest sum.
Problem Link: https://leetcode.com/problems/kth-lar...
Code Link: https://leetcode.com/submissions/deta...
We implement the solution using a breadth-first search (BFS) approach with a queue to traverse the tree level by level. Each level's sum is stored in a vector, which is then sorted in descending order to find the k-th largest sum. If k is larger than the number of levels in the tree, the function returns -1.
Here's a quick breakdown of the steps:
1. Initialize a queue to store nodes for BFS traversal.
2. Iterate through each level, compute the sum of node values, and push the sum to the vector.
3. After traversing all levels, sort the sums in descending order.
4. Return the k-th largest sum, or -1 if k exceeds the number of levels.
Don't forget to like and subscribe for more coding problem solutions and tutorials!
#BinaryTree #CPlusPlus #KthLargestSum #LeetCode #BFS #Algorithms #CodingInterview #DataStructures
Let me know if you have any questions in the comments below!