Prerequisite : Introduction and DFS The task is to find LCA of two given nodes in a tree (not necessarily a Binary Tree). In previous… Read More »
Given an array of N elements and two integers A, B which belongs to the given array. Create a Binary Search Tree by inserting element… Read More »
In previous posts, we have discussed how to calculate the Lowest Common Ancestor (LCA) for a binary tree and a binary search tree (this, this… Read More »
Prerequisites : LCE(Set 1), LCE(Set 2), Suffix Array (n Log Log n), Kasai’s algorithm and Segment Tree The Longest Common Extension (LCE) problem considers a… Read More »
The Longest Common Extension (LCE) problem considers a string s and computes, for each pair (L , R), the longest sub string of s that… Read More »
Prerequisite : LCA basics, Disjoint Set Union by Rank and Path Compression We are given a tree(can be extended to a DAG) and we have… Read More »
Given values of two nodes in a Binary Tree, find the Lowest Common Ancestor (LCA). It may be assumed that both nodes exist in the… Read More »
We strongly recommend to refer below post as a prerequisite of this. Heavy Light Decomposition | Set 1 (Introduction) In the above post, we discussed… Read More »
Heavy Light decomposition (HLD) is one of the most used techniques in competitive programming. Example Problem: Let us understand Heavy-light decomposition (HLD) with the help… Read More »
The article describes an approach to solving the problem of finding the LCA of two nodes in a tree by reducing it to a RMQ… Read More »
Find the distance between two keys in a binary tree, no parent pointers are given.
Given a binary tree (not a binary search tree) and two values say n1 and n2, write a program to find the least common ancestor.
Given values of two nodes in a Binary Search Tree, write a c program to find the Lowest Common Ancestor (LCA). You may assume that… Read More »