if the two trees are flip equivalent or false otherwise.

Example 1:

Input: root1 = [1,2,3,4,5,6,null,null,null,7,8], root2 = [1,3,2,null,6,4,5,null,null,null,null,8,7]
Output: true
Explanation: We flipped at nodes with values 1, 3, and 5.

Example 2:

Input: root1 = [], root2 = []
Output: true

Example 3:

Input: root1 = [], root2 = [1]
Output: false

Constraints:

The number of nodes in each tree is in the range [0, 100].
Each tree will have unique node values in the range [0, 99].

22:T432,For a binary tree **T** , we can define a **flip operation** as follows: choose any node, and swap the left and right child subtrees. A binary tree **X** is _flip equivalent_ to a binary tree **Y** if and only if we can make **X** equal to **Y** after some number of flip operations. Given the roots of two binary trees `root1` and `root2`, return `true` if the two trees are flip equivalent or `false` otherwise. **Example 1:** ![Flipped Trees Diagram](https://assets.leetcode.com/uploads/2018/11/29/tree_ex.png) **Input:** root1 = [1,2,3,4,5,6,null,null,null,7,8], root2 = [1,3,2,null,6,4,5,null,null,null,null,8,7] **Output:** true **Explanation:** We flipped at nodes with values 1, 3, and 5. **Example 2:** **Input:** root1 = [], root2 = [] **Output:** true **Example 3:** **Input:** root1 = [], root2 = [1] **Output:** false **Constraints:** * The number of nodes in each tree is in the range

Flip Equivalent Binary Trees

Problem Description

Problem Description

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