19.相同的树(简单)

    科技2024-11-18  22

    给定两个二叉树,编写一个函数来检验它们是否相同。

    如果两个树在结构上相同,并且节点具有相同的值,则认为它们是相同的。

    示例 1:

    输入:             1          1                      / \         / \                    2   3     2   3

    [1,2,3], [1,2,3]

    输出: true 示例 2:

    输入:            1           1                    /                \                  2                  2

    [1,2], [1,null,2]

    输出: false 示例 3:

    输入:            1           1                     / \          / \                   2   1      1   2

    [1,2,1], [1,1,2]

    输出: false

    # 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 isSameTree(self, p: TreeNode, q: TreeNode) -> bool: if p!=None and q!=None: if p.val == q.val: return self.isSameTree(p.left, q.left) and self.isSameTree(p.right,q.right) else: return False elif p==None and q==None: return True else: return False

    Processed: 0.014, SQL: 8