he Floyd-Warshall algorithm is a shortest path algorithm for graphs. Like the Bellman-Ford algorithm or the Dijkstra's algorithm, it computes the shortest path in a graph. However, Bellman-Ford and Dijkstra are both single-source, shortest-path algorithms. This means they only compute the shortest path from a single source. Floyd-Warshall, on the other hand, computes the shortest distances between every pair of vertices in the input graph.
a)
Here the shortest distance matrix P has already been calculated,
A | B | C | D | E | F | G | H | |
A | 0 | 0 | 5 | 0 | 2 | 0 | 5 | 5 |
B | 0 | 0 | 5 | 5 | 0 | 1 | 5 | 5 |
C | 5 | 5 | 0 | 5 | 0 | 5 | 5 | 0 |
D | 0 | 5 | 5 | 0 | 0 | 7 | 0 | 7 |
E | 2 | 0 | 0 | 0 | 0 | 2 | 0 | 3 |
F | 0 | 1 | 5 | 7 | 2 | 0 | 0 | 7 |
G | 5 | 5 | 5 | 0 | 0 | 0 | 0 | 0 |
H | 5 | 5 | 0 | 7 | 3 | 7 | 0 | 0 |
We can see from the given matrix that the shortest distance between the nodes D and F is 7 (underlined in the matrix)
6. [20 pts.] Below is the final P matrix after applying Floyd's all pairs shortest path algorith on a graph with nodes (A, B, C, D, E, F, G, H). In the matrix below 1 corresponds o 0 5 0 2 0...
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