They are given in the data file. In the numbers n, p and q where n is the number of nodes of a tree and p and q are nodes in the tree. Then read the daddy vector through which the tree is represented. Display the elementary chain from vertex p to vertex q.
Example:
date.in
7 2 5
4 1 7 0 7 7 1
date.out
2 1 7 5
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is this this coputer science
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