[Solved] CECS328-Lab7

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Programming assignment 7.

Due date: Monday, November 30, 2020 at 11:59pm

Note: you can have different names for vertices: {a b c d e ..} = {v1 v2 v3 v4 ..} = {1 2 3 4 ..}

In this program you are required to implement BFS.

First, you can create the below graph and print the resulting adjacency matrix/list. Or create a random graph.

Part A.

  1. Request the user to determine the starting vertex (a) for BFS algorithm
  2. Call BFS function to find the vertices reachable from vertex u and print the shortest paths and their lengths/distances.

Part B.

In this part you are required to determine if a random undirected graph is bipartite or not. You can use the below graph to test.

Here, we work with three colors for the vertices: gray (not visited), [blue, red] (opposite colors)

  1. Print the resulting adjacency matrix/list.
  2. Implement 2 functions: Explore and Is_bipartite
  3. In Explore function,
    1. For each vertex (v) initialize color = “gray”.
    2. Start from the first vertex, color it “blue” and call Is_bipartite on that.
    3. Next, go to the next unexplored vertex (having gray color), color it “blue” and call Is_bipartite
    4. Repeat step c. until every vertex is explored/colored or a not bipartite graph is detected.
  4. Now to implement our second function (Is_bipartite), you need to change your BFS function in part A. a. Keep popping each vertex from Q. (call it u)
    1. Go to the adjacency list of u, (adj(u)), and for each neighbor (v):
    2. If v. color == “gray”, assign an opposite color to v and push it into the Q. (Example: u.color is blue, and v.color is gray ➔ we set v.color = “red”)
    3. Else if v.color == u.color: Stop the entire code and print “NOT bipartite”.
  5. Print the color of all the vertices.

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[Solved] CECS328-Lab7
10 USD $