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Binary Tree From Inorder And Postorder

Given inorder and postorder traversal of a tree, construct the binary tree.

Note: You may assume that duplicates do not exist in the tree.

Example :

Input : 
        Inorder : [2, 1, 3]
        Postorder : [2, 3, 1]

Return : 
           / \
          2   3

NOTE: You only need to implement the given function. Do not read input, instead use the arguments to the function. Do not print the output, instead return values as specified. Still have a doubt? Checkout Sample Codes for more details.
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