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Create 105.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`	`+class Solution:`
	`8`	`+ def buildTree(self, preorder: List[int], inorder: List[int]) -> Optional[TreeNode]:`
	`9`	`+ if not inorder:`
	`10`	`+ return None`
	`11`	`+ root = TreeNode(preorder[0])`
	`12`	`+ mid = inorder.index(root.val)`
	`13`	`+ root.left = self.buildTree(preorder[1:mid+1], inorder[:mid])`
	`14`	`+ root.right = self.buildTree(preorder[mid+1:], inorder[mid+1:])`
	`15`	`+ return root`

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