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Showing posts from August, 2011

Is Binary search tree - Java Program

  /**    * Following method can be used to test if a tree meets the conditions to be a binary search tree (BST).    */    public boolean isBST(TreeNode root) {       if (root == null)           return false;       return( isBST(root, Integer.MIN_VALUE, Integer.MAX_VALUE) );   }   /**     * Recursive Method - which validates very sub tree of a given binary tree.    * Works in O(n) time -- visits each node only once.     * @param min   For left sub tree it should be Integer.MIN_Value    *                        For right sub tree it should be node.data + 1    * @param max For left sub tree it should be node.data    *                     For right sub tree it should be Integer.MAX_...