Exercise: Binary Tree Traversal II

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Prerequisites

Before reading this article, you should first learn:

If you need to perform operations on certain nodes in a binary tree, generally you can use the traversal mindset.

404. Sum of Left Leaves

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623. Add One Row to Tree

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971. Flip Binary Tree To Match Preorder Traversal

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987. Vertical Order Traversal of a Binary Tree

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993. Cousins in Binary Tree

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1315. Sum of Nodes with Even-Valued Grandparent

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1448. Count Good Nodes in Binary Tree

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