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3 cards from this section. Quick, good the night before a test.
What is the initial distance assigned to all vertices except the source in Dijkstra's algorithm?
All vertices start with a distance of what value except the source?
True or False: Dijkstra's algorithm can handle negative weight edges.
What happens with negative weights in shortest path problems?
What is the main objective of Dijkstra's algorithm?
What are we trying to minimize in this algorithm?
Dijkstra's algorithm uses which type of approach?
Does it make local choices for global outcomes?
Given a graph with vertices A, B, C, and D with weights: A to B (1), A to C (4), B to C (2), B to D (6), and C to D (1). Using Dijkstra's algorithm from A, calculate the shortest path to D.
Trace the paths starting from A and calculate the weights.
Explain the shortcomings of Dijkstra's algorithm when applied to a graph with negative edges and provide an example of why it fails.
Consider paths and how weights impact total distance, especially when negative options are available.
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