How to find the lowest common ancestor of two nodes in any binary tree?

The Binary Tree here is may not necessarily be a Binary Search Tree. The structure could be taken as – struct node { int data; struct node *left; struct node *right; }; The maximum solution I could work out with a friend was something of this sort – Consider this binary tree : The inorder … Read more

Are duplicate keys allowed in the definition of binary search trees?

I’m trying to find the definition of a binary search tree and I keep finding different definitions everywhere. Some say that for any given subtree the left child key is less than or equal to the root. Some say that for any given subtree the right child key is greater than or equal to the … Read more