Chapter 4: Q2E (page 132)
Just like the previous problem, but this time with the Bellman-Ford algorithm.

Short Answer
The table that illustrates the Bellman-Ford algorithm’s values:

Chapter 4: Q2E (page 132)
Just like the previous problem, but this time with the Bellman-Ford algorithm.

The table that illustrates the Bellman-Ford algorithm’s values:

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Give an algorithm that takes as input a directed graph with positive edge lengths, and returns the length of the shortest cycle in the graph (if the graph is acyclic, it should say so). Your algorithm should take time at most .
Squares.Design and analyse an algorithm that takes as input an undirected graph G(V,E) and determines whether graph contains a simple cycle (that is, a cycle which doesn’t intersect itself) of length four. Its running time should be at most time.
You may assume that the input graph is represented either as an adjacency matrix or with adjacency lists, whichever makes your algorithm simpler.
You are given a strongly connected directed graph with positive edge weights along with a particular . Give an efficient algorithm for finding shortest paths between all pairs of nodes, with the one restriction that these paths must all pass through .
You are given a directed graph with (possibly negative) weighted edges, in which the shortest path between any two vertices is guaranteed to have at most edges. Give an algorithm that finds the shortest path between two vertices u and v in time.
Suppose Dijkstra’s algorithm is run on the following graph, starting at node A.
a) Draw a table showing the intermediate distance values of all the nodes at each iteration of the algorithm.
b) Show the final shortest-path tree.
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