100_Same Tree.py

# -*- coding: utf-8 -*-
"""
Created on Wed Sep  4 10:45:34 2019

@author: leiya
"""


# Definition for a binary tree node.
# class TreeNode:
#     def __init__(self, x):
#         self.val = x
#         self.left = None
#         self.right = None

class Solution:
    def isSameTree(self, p: TreeNode, q: TreeNode) -> bool:
        if p is None and q is None:
            return True
        if p is None or q is None:
            return False
        if p.val != q.val:
            return False
        else:
            return self.isSameTree(p.left, q.left) and self.isSameTree(p.right, q.right)
        
class Solution:
    def isSameTree(self, p: TreeNode, q: TreeNode) -> bool:
        if p and q:
            return p.val == q.val and self.isSameTree(p.left,q.left) and self.isSameTree(p.right,q.right)
        else:
            return p == q
        
class Solution:
    def isSameTree(self, p: TreeNode, q: TreeNode) -> bool:
        if p is None and q is None:
            return True
        if p is not None and q is not None:
            return p.val == q.val and self.isSameTree(p.left,q.left) and self.isSameTree(p.right,q.right)
        else:
            return False