Consider all the leaves of a binary tree, from left to right order, the values of those leaves form a leaf value sequence.
For example, in the given tree above, the leaf value sequence is (6, 7, 4, 9, 8)
.
Two binary trees are considered leaf-similar if their leaf value sequence is the same.
Return true
if and only if the two given trees with head nodes root1
and root2
are leaf-similar.
Example 1:
Input: root1 = [3,5,1,6,2,9,8,null,null,7,4], root2 = [3,5,1,6,7,4,2,null,null,null,null,null,null,9,8] Output: true
Example 2:
Input: root1 = [1], root2 = [1] Output: true
Example 3:
Input: root1 = [1], root2 = [2] Output: false
Example 4:
Input: root1 = [1,2], root2 = [2,2] Output: true
Example 5:
Input: root1 = [1,2,3], root2 = [1,3,2] Output: false