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Create 106.py

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	`1`	`+# Definition for a binary tree node.`
	`2`	`+# class TreeNode:`
	`3`	`+# def __init__(self, val=0, left=None, right=None):`
	`4`	`+# self.val = val`
	`5`	`+# self.left = left`
	`6`	`+# self.right = right`
	`7`	`+classSolution:`
	`8`	`+defbuildTree(self,inorder:List[int],postorder:List[int])->Optional[TreeNode]:`
	`9`	`+ifnotinorder:`
	`10`	`+returnNone`
	`11`	`+root=TreeNode(postorder.pop())`
	`12`	`+mid=inorder.index(root.val)`
	`13`	`+root.left=self.buildTree(inorder[:mid],postorder[:mid])`
	`14`	`+root.right=self.buildTree(inorder[mid+1:],postorder[mid:])`
	`15`	`+returnroot`

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