100_Same_Tree.py

from collections import deque


class Solution:
    def isSameTree(self, p, q):
        """
        :type p: TreeNode
        :type q: TreeNode
        :rtype: bool
        """

        def check(p, q):
            # if both are None
            if not p and not q:
                return True
            # one of p and q is None
            if not q or not p:
                return False
            if p.val != q.val:
                return False
            return True

        deq = deque([(p, q), ])
        while deq:
            p, q = deq.popleft()
            if not check(p, q):
                return False
            if p:
                deq.append((p.left, q.left))
                deq.append((p.right, q.right))
        return True