Given the graph G from Question 2, using the Graph Breadth-First Search algorithm with a Queue. please do the following: Assume that the start node is 4 (e.g. node = 4). Demonstrate a step-by-step, manual desk-check execution of the BFS algorithm, showing the values of all variables and arrays (e.g. visited, inqueue, Q) for each step in each cycle of each loop, as demonstrated in class. " Algorithm: Graph breadth-first search BFS (G, node) visited Input: G=(V.E), a graphy node, the starting vertex in G 6 Output: visited, an array of size [V] such that visited[i] is TRUE if we have visited node i, FALSE otherwise 10-CreateQueue () 2 visited 3 inqueue - CreateArray(V) 4 for 0 to VI do CreateArray (VI) visited[i] FALSE inqueue[] FALSE 7 Enqueue (Q, node) ainqueue[node] + TRUE 9 while not IsQueueEmpty(Q) do 10 cDequeue (Q) inqueue[c]FALSE visited[e]-TRUE foreach u in AdjacencyList (G, c) do if not visited[v] and not inqueue[v] then 11 12 13 14 15 16 17 return visited Enqueue (Q.) inqueue[v] - TRUE
Given the graph G from Question 2, using the Graph Breadth-First Search algorithm with a Queue. please do the following: Assume that the start node is 4 (e.g. node = 4). Demonstrate a step-by-step, manual desk-check execution of the BFS algorithm, showing the values of all variables and arrays (e.g. visited, inqueue, Q) for each step in each cycle of each loop, as demonstrated in class. " Algorithm: Graph breadth-first search BFS (G, node) visited Input: G=(V.E), a graphy node, the starting vertex in G 6 Output: visited, an array of size [V] such that visited[i] is TRUE if we have visited node i, FALSE otherwise 10-CreateQueue () 2 visited 3 inqueue - CreateArray(V) 4 for 0 to VI do CreateArray (VI) visited[i] FALSE inqueue[] FALSE 7 Enqueue (Q, node) ainqueue[node] + TRUE 9 while not IsQueueEmpty(Q) do 10 cDequeue (Q) inqueue[c]FALSE visited[e]-TRUE foreach u in AdjacencyList (G, c) do if not visited[v] and not inqueue[v] then 11 12 13 14 15 16 17 return visited Enqueue (Q.) inqueue[v] - TRUE
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Breadth First Search
Traversal algorithm involves visiting the vertices of the graph exactly once in some specific order. Breadth first search involves visiting the source node, visiting all the child nodes of the source node, visiting all child nodes of each of each of the node visited earlier and so forth. It involves visiting the nodes of the graph level by level.
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