LeetCode 풀기 - 965. Univalued Binary Tree

965. Univalued Binary Tree

https://leetcode.com/problems/univalued-binary-tree/

Univalued Binary Tree - LeetCode

문제)

솔루션1) Recursive

# Definition for a binary tree node.
# class TreeNode:
#     def __init__(self, val=0, left=None, right=None):
#         self.val = val
#         self.left = left
#         self.right = right
class Solution:
    def isUnivalTree(self, root: Optional[TreeNode]) -> bool:
        def recur(node, val):
            if node is None:
                return True
            
            if node.val != val:
                return False
            return recur(node.left, node.val) and recur(node.right, node.val)
        
        return recur(root, root.val)