Tuesday, August 24, 2010

Microsoft Question: Find the nearest sibling of a given node in a tree. Nodes on same level are siblings of each other


Step 1: Do a preorder traversal of a tree and add sequence number corresponding to each node.

Step 2:  Now do a level order traversal of a tree and if a key appears in a level take the node with minimum difference in the sequence no with respect to the key, that will be the nearest sibling of the key.

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