Binary Tree Notes

• 返回结果不是最终结果
• Bianry Tree Maximum Path Sum
• Balanced Binary Tree

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• 改结构类型
• binary tree upside down
• 114. Flatten Binary Tree to Linked List

• Divide and conquer

本质上是post order,因为是先知道了左子树和右子树的结果再结合到root。

• 104. Maximum Depth of Binary Tree
• Binary Tree Longest Consecutive Sequence
• Path相关的，传target, 直接比较
• binary-tree-longest-consecutive-sequence