Easy Python codes which beet over 85%

  • 0

    Easy python code using stack.

    def sumOfLeftLeaves(self, root):
            :type root: TreeNode
            :rtype: int
            row = [root]
            r = 0
            while row:
                currentNode = row.pop()
                if currentNode<>None:
                    if currentNode.left<>None and currentNode.left.left==None and currentNode.left.right ==None:
                        r = currentNode.left.val+r
            return r

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