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formatting the former commit
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@ -189,6 +189,7 @@ class Solution:
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res.append(node.val)
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res.append(node.val)
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dfs(node.left)
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dfs(node.left)
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dfs(node.right)
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dfs(node.right)
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dfs(root)
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dfs(root)
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return res
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return res
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@ -225,6 +226,7 @@ class Solution:
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dfs(node.left)
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dfs(node.left)
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dfs(node.right)
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dfs(node.right)
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res.append(node.val)
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res.append(node.val)
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dfs(root)
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dfs(root)
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return res
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return res
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```
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```
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