Code in Python only In a rooted tree, the lowest common ancestor (or LCA for short) of two vertices u and v is defined as the lowest vertex that is ancestor of both that two vertices. Given a tree of N vertices, you need to answer the question of the form "ruv" which means if the root of the tree is at r then what is LCA of u and v. Input: 4 12 23 14 2 142 242 Output: 2

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Code in Python only
In a rooted tree, the lowest common ancestor (or LCA for short) of two vertices u and v is defined as the lowest vertex that is ancestor of both
that two vertices. Given a tree of N vertices, you need to answer the question of the form "ru v" which means if the root of the tree is at r then
what is LCA of u and v.
Input:
4
12
23
14
2
142
242
Output:
1
2
Transcribed Image Text:Code in Python only In a rooted tree, the lowest common ancestor (or LCA for short) of two vertices u and v is defined as the lowest vertex that is ancestor of both that two vertices. Given a tree of N vertices, you need to answer the question of the form "ru v" which means if the root of the tree is at r then what is LCA of u and v. Input: 4 12 23 14 2 142 242 Output: 1 2
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