Same Tree

Given two binary trees, write a function to check if they are equal or not.

Two binary trees are considered equal if they are structurally identical and the nodes have the same value.

URL: https://leetcode.com/problems/same-tree/

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


class Solution:
    # @param {TreeNode} p
    # @param {TreeNode} q
    # @return {boolean}
    def isSameTree(self, p, q):
        if p == None and q == None:
            return True
        else:
            if p == None or q == None:
                return False
            else:
                if p.val == q.val:
                    return self.isSameTree(p.left, q.left) and self.isSameTree(p.right, q.right)
                else:
                    return False