Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Given a binary search tree (BST), find the lowest common ancestor
(LCA) of two given nodes in the BST. According to the definition of
LCA: "The lowest common ancestor is defined between two nodes p
and q as the lowest node in t that has both p and q as descendants
(where we allow a node to be a descendant of itself)." For example,
in the figure from question 1, the LCA between nodes 5 and 46 is 21.
You may use the following typedef structure. The function returns the
reference of the node that is considered the LCA.
typedef struct node_s{
int data;
struct node_s * leftchild;
struct node _s * rightchild;
}node_t;
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Transcribed Image Text:Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST. According to the definition of LCA: "The lowest common ancestor is defined between two nodes p and q as the lowest node in t that has both p and q as descendants (where we allow a node to be a descendant of itself)." For example, in the figure from question 1, the LCA between nodes 5 and 46 is 21. You may use the following typedef structure. The function returns the reference of the node that is considered the LCA. typedef struct node_s{ int data; struct node_s * leftchild; struct node _s * rightchild; }node_t;
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