Inorder Traversal of Cartesian Tree

Given an inorder traversal of a cartesian tree, construct the tree.

Cartesian tree : is a heap ordered binary tree, where the root is greater than all the elements in the subtree.

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

Example :

Input : [1 2 3]

Return :   
          3
         /
        2
       /
      1
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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