100.Same Tree(E)

100. same tree

100. Same Tree
Given two binary trees, write a function to check if they are the same or not.

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

Example 1:

Input:     1         1
          /        / 
         2   3     2   3

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

Output: true

Example 2:

Input:     1         1
          /           
         2             2

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

Output: false

Example 3:

Input:     1         1
          /        / 
         2   1     1   2

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

Output: false

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


class Solution:
    def isSameTree(self, p, q):
        """
        :type p: TreeNode
        :type q: TreeNode
        :rtype: bool
        """
        if (not p and q) or (p and not q):
            return False
        elif not p and not q:
            return True
        p_queue = deque([(1, p), ])
        q_queue = deque([(1, q), ])

        while p_queue and q_queue:
            p_depth, p_root = p_queue.popleft()
            q_depth, q_root = q_queue.popleft()
            if p_depth != q_depth or p_root.val != q_root.val:
                return False

            if p_root.left and q_root.left:
                if p_root.left.val == q_root.left.val:
                    p_queue.append((p_depth + 1, p_root.left))
                    q_queue.append((q_depth + 1, q_root.left))
                else:
                    return False
            elif not p_root.left and not q_root.left:
                pass
            else:
                return False

            if p_root.right and q_root.right:
                if p_root.right.val == q_root.right.val:
                    p_queue.append((p_depth + 1, p_root.right))
                    q_queue.append((q_depth + 1, q_root.right))
                else:
                    return False
            elif not p_root.right and not q_root.right:
                pass
            else:
                return False

        print("return..")
        return True

    def isSameTree_32ms(self, p, q):
        stack = [(p, q)]
        while stack:
            n1, n2 = stack.pop()
            if n1 and n2 and n1.val == n2.val:
                stack.append((n1.right, n2.right))
                stack.append((n1.left, n2.left))
            elif not n1 and not n2:
                continue
            else:
                return False
        return True

    def isSameTree_recursion36ms(self, p, q):
        """
        :type p: TreeNode
        :type q: TreeNode
        :rtype: bool
        """
        if (not p and q) or (not q and p): return False
        if not (p and q): return True
        if p.val == q.val:
            return self.isSameTree_recursion36ms(p.left, q.left) and 
                   self.isSameTree_recursion36ms(p.right, q.right)
        else:
            return False