Compute Limb Lengths in a Tree solved by 360

Limb Length Problem

Find the limb length for a leaf in a tree.

Given: An integer n, followed by an integer j between 0 and n - 1, followed by a space-separated additive distance matrix D (whose elements are integers).

Return: The limb length of the leaf in Tree(D) corresponding to row j of this distance matrix (use 0-based indexing).

Sample Dataset

4
1
0   13  21  22
13  0   12  13
21  12  0   13
22  13  13  0

Sample Output

2

Extra Dataset

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