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6. Dijkstra's Algorithm assumes that all edge weights in a given weighted directed graph G =...
5. (10 pts) Give a concrete example of a directed and weighted graph G and two...
5. (10 pts) Give a concrete example of a directed and weighted graph G and two vertices u and v, where the Dijkstra's algorithm does not find the shortest path from u to v in G but the Bellman-Ford algorithm does. Obviously such a graph must have at least one negative- weight edge.
a. (15 marks) i (7 marks) Consider the weighted directed graph below. Carry out the steps...
a. (15 marks) i (7 marks) Consider the weighted directed graph below. Carry out the steps of Dijkstra's shortest path algorithm as covered in lectures, starting at vertex S. Consequently give the shortest path from S to vertex T and its length 6 A 2 3 4 S T F ii (2 marks) For a graph G = (V, E), what is the worst-case time complexity of the version of Dijkstra's shortest path algorithm examined in lectures? (Your answer should...
Which of the following graph algorithms is designed specifically to accept negative edge weights? Check all...
Which of the following graph algorithms is designed specifically to accept negative edge weights? Check all that apply. a. topological sort b. Dijkstra's algorithm c. Bellman-Ford algorithm d. unweighted shortest path algorithm
Consider the following weighted, directed graph G. There are 7 vertices and 10 edges. The edge list E is as follows:
Consider the following weighted, directed graph G. There are 7 vertices and 10 edges. The edge list E is as follows:The Bellman-Ford algorithm makes |V|-1 = 7-1 = 6 passes through the edge list E. Each pass relaxes the edges in the order they appear in the edge list. As with Dijkstra's algorithm, we record the current best known cost D[V] to reach each vertex V from the start vertex S. Initially D[A]=0 and D[V]=+oo for all the other vertices...
3, (30 points) Given a directed graph G - N. E), each edge eEhas weight We, 3, (30 points) Given a directed graph...
3, (30 points) Given a directed graph G - N. E), each edge eEhas weight We, 3, (30 points) Given a directed graph G (V, E), each edgee which can be positive or negative. The zero weight cycle problem is that whether exists a simple cycle (each vertex passes at most once) to make the sum of the weights of each edge in G is exactly equal to 0. Prove that the problem is NP complete.
3, (30 points) Given...
5. Here are the vertices and edges of directed graph G: V= {2.6.c.de.f} E= {ab, ac,...
5. Here are the vertices and edges of directed graph G: V= {2.6.c.de.f} E= {ab, ac, af ca. bc. be.bf. cd, ce, de, df). Weights: w(ab) = 2 w(ac) = 5, w(af) = 10, w(ca) = 2. w(be) = 2. w(be) = 10, w(bf) = 11. w(cd)= 9. w(ce) = 7. w(de) = 2. w(df) = 2. a. Draw the Graph. This is a directed, weighted graph so you need to include arrows and weights. You can insert a pic...
3. Let G=(V.E) be a weighted, directed graph with weight function w: E->{0,1,...,W} for some nonnegative...
3. Let G=(V.E) be a weighted, directed graph with weight function w: E->{0,1,...,W} for some nonnegative integer W. Modify Dijkstra's algorithm to compute the shorted paths from a given source vertext s in O(WV+E) time. Hint: no path can have a weight larger than VW: use VW buskets, where each busket is a linked list for the vertices having same d value.
Let G = (V, E, W) be a connected weighted graph where each edge e has...
Let G = (V, E, W) be a connected weighted graph where each edge e has an associated non-negative weight w(e). We call a subset of edges F subset of E unseparating if the graph G' = (V, E\F) is connected. This means that if you remove all of the edges F from the original edge set, this new graph is still connected. For a set of edges E' subset of E the weight of the set is just the...
Question 6 Let G be the weighted graph (a) Use Dijkstra's algorithm to find the shortest path from A to F. You can...
Question 6 Let G be the weighted graph (a) Use Dijkstra's algorithm to find the shortest path from A to F. You can do all the work on a single diagram, but, to show that you have used the algorithm correctly, if an annotation needs updating do not erase itjust put a line through it and write the new annotation above that b) In what order are the vertices added to the tree? (c) Notice that the algorithm does not,...
Suppose that we are given a model of a city as a directed, weighted graph G...
Suppose that we are given a model of a city as a directed, weighted graph G = (V, E); w : E → R≥0, where we have n neighbourhoods and m streets, represented by the vertices and edges respectively. We will assume that the streets are one-way. We are also given that k of these neighbourhoods have fire stations installed. We want to find the nearest fire station for each neighbourhood, where we measure the distance from the fire station...
5. (10 pts) Give a concrete example of a directed and weighted graph G and two vertices u and v, where the Dijkstra's algorithm does not find the shortest path from u to v in G but the Bellman-Ford algorithm does. Obviously such a graph must have at least one negative- weight edge.
a. (15 marks) i (7 marks) Consider the weighted directed graph below. Carry out the steps of Dijkstra's shortest path algorithm as covered in lectures, starting at vertex S. Consequently give the shortest path from S to vertex T and its length 6 A 2 3 4 S T F ii (2 marks) For a graph G = (V, E), what is the worst-case time complexity of the version of Dijkstra's shortest path algorithm examined in lectures? (Your answer should...
3, (30 points) Given a directed graph G - N. E), each edge eEhas weight We, 3, (30 points) Given a directed graph G (V, E), each edgee which can be positive or negative. The zero weight cycle problem is that whether exists a simple cycle (each vertex passes at most once) to make the sum of the weights of each edge in G is exactly equal to 0. Prove that the problem is NP complete.
3, (30 points) Given...
5. Here are the vertices and edges of directed graph G: V= {2.6.c.de.f} E= {ab, ac, af ca. bc. be.bf. cd, ce, de, df). Weights: w(ab) = 2 w(ac) = 5, w(af) = 10, w(ca) = 2. w(be) = 2. w(be) = 10, w(bf) = 11. w(cd)= 9. w(ce) = 7. w(de) = 2. w(df) = 2. a. Draw the Graph. This is a directed, weighted graph so you need to include arrows and weights. You can insert a pic...
3. Let G=(V.E) be a weighted, directed graph with weight function w: E->{0,1,...,W} for some nonnegative integer W. Modify Dijkstra's algorithm to compute the shorted paths from a given source vertext s in O(WV+E) time. Hint: no path can have a weight larger than VW: use VW buskets, where each busket is a linked list for the vertices having same d value.
Let G = (V, E, W) be a connected weighted graph where each edge e has an associated non-negative weight w(e). We call a subset of edges F subset of E unseparating if the graph G' = (V, E\F) is connected. This means that if you remove all of the edges F from the original edge set, this new graph is still connected. For a set of edges E' subset of E the weight of the set is just the...
Question 6 Let G be the weighted graph (a) Use Dijkstra's algorithm to find the shortest path from A to F. You can do all the work on a single diagram, but, to show that you have used the algorithm correctly, if an annotation needs updating do not erase itjust put a line through it and write the new annotation above that b) In what order are the vertices added to the tree? (c) Notice that the algorithm does not,...
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