## Question

###### Suppose we also wish to compute the vertices on shortest paths in the algorithms of this section. Show how to compute the predecessor matrix $\Pi$ from the completed matrix $L$ of shortest-path weights in $O\left(n^{3}\right)$ time.

Suppose we also wish to compute the vertices on shortest paths in the algorithms of this section. Show how to compute the predecessor matrix $\Pi$ from the completed matrix $L$ of shortest-path weights in $O\left(n^{3}\right)$ time.

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