title: Construction of BST from given Postorder Traversal
body: <p>I have postorder array of a BST tree size n how do i show there is only one BST that can be constructed form it. I know I can rebuild the tree if I add nodes from right to left but how do I show there is only one right tree?</p>
  
  <p>I have tried saying there are two possible trees and tried showing it is not possible but got stuck </p>