# Maximum Level Sum of a Binary Tree

Category

Binary Tree - BFS

Checkbox

Checkbox

Difficulty

Medium

Index

40

Key Ideas

The key idea to solve this problem is to perform a breadth-first search (BFS) traversal of the binary tree while keeping track of the maximum sum at each level.

Problem Number

1161

Problem Summary

**Problem Summary:**The "Maximum Level Sum of a Binary Tree" problem is about finding the level in a binary tree that has the maximum sum of node values. The task is to return the level number that corresponds to the maximum sum.

**Key Pitfalls:**- It's important to handle edge cases, such as an empty tree or a tree with only one node. - Be careful when performing the level-wise traversal to calculate the sum. Ensure that the sum is properly updated for each level. - Take into account the possibility of negative values in the tree nodes when calculating the level sum.

Solution Summary

The best solution to solve the Maximum Level Sum of a Binary Tree problem is to use a breadth-first search (BFS) traversal technique. Starting from the root node, we can traverse the tree level by level, keeping track of the sum of each level. By maintaining a maximum sum variable, we can update it whenever we find a level with a higher sum. To perform the BFS, we can use a queue data structure. By iterating through each level, summing the values, and updating the maximum sum, we can find the level with the maximum sum in the binary tree. This approach ensures that we consider all nodes in the tree and find the maximum level sum efficiently.

Tags

Tree

Depth-First Search

Breadth-First Search