python leetcode 257. Binary Tree Paths

阿新 • • 發佈：2018-12-22

class Solution:
    def binaryTreePaths(self, root):
        """
        :type root: TreeNode
        :rtype: List[str]
        """
        if not root:
            return []
        res=[]
        def dfs(root,s):
            if not root.left and not root.right:
                return res.append( 
s+str(root.val))
            if root.left:
                dfs(root.left,s+str(root.val)+'->')
            if root.right:
                dfs(root.right,s+str(root.val)+'->')
        dfs(root,"")
        return res

python leetcode 257. Binary Tree Paths

class Solution: def binaryTreePaths(self, root): """ :type root: TreeNode :rtype: List[str] """ if not

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python leetcode 257. Binary Tree Paths

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