Question: A directed graph with n vertices is given by its adjacency matrix ( the graph has no edge weights ) . We would like to

A directed graph with n vertices is given by its adjacency matrix (the graph has
no edge weights). We would like to decide about all pairs of vertices u and v whether there
exists a directed path from u to v. Modify the Floyd-Warshall algo to solve this task, the
running time should remain O(n^3
).

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