102. Binary Tree Level Order Traversal https://leetcode.com/problems/binary-tree-level-order-traversal
107. Binary Tree Level Order Traversal II https://leetcode.com/problems/binary-tree-level-order-traversal-ii
103. Binary Tree Zigzag Level Order Traversal https://leetcode.com/problems/binary-tree-zigzag-level-order-traversal
117. Populating Next Right Pointers in Each Node II https://leetcode.com/problems/populating-next-right-pointers-in-each-node-ii
662. Maximum Width of Binary Tree https://leetcode.com/problems/maximum-width-of-binary-tree
515. Find Largest Value in Each Tree Row https://leetcode.com/problems/find-largest-value-in-each-tree-row
637. Average of Levels in Binary Tree https://leetcode.com/problems/average-of-levels-in-binary-tree
958. Check Completeness of a Binary Tree https://leetcode.com/problems/check-completeness-of-a-binary-tree
1161. Maximum Level Sum of a Binary Tree https://leetcode.com/problems/maximum-level-sum-of-a-binary-tree
1302. Deepest Leaves Sum https://leetcode.com/problems/deepest-leaves-sum
1609. Even Odd Tree https://leetcode.com/problems/even-odd-tree
Prerequisite Knowledge
Before reading this article, you need to learn:
Most binary tree problems can be solved using recursive algorithms. However, for a few problems where recursion is cumbersome, we can consider using level-order traversal methods.
