Adjacency Matrix(Graph) - Insertion & DeletionGiven an adjacency matrix g[][] of a graph consisting of N vertices, the task is to modify the matrix after insertion of all edges[] and removal of edge between vertices (X, Y). In an adjacency matrix, if an edge exists between vertices i and j of the graph, then g[i][j] = 1 and g[j][i] = 1. If no edge exists between these two vertices, then g[i][j] = 0 and g[j][i] = 0.Input: N = 6, Edges[] = {{0, 1}, {0, 2}, {0, 3}, {0, 4}, {1, 3}, {2, 3}, {2, 4}, {2, 5}, {3, 5}}, X = 2, Y = 3
Question
Adjacency Matrix(Graph) - Insertion & DeletionGiven an adjacency matrix g[][] of a graph consisting of N vertices, the task is to modify the matrix after insertion of all edges[] and removal of edge between vertices (X, Y). In an adjacency matrix, if an edge exists between vertices i and j of the graph, then g[i][j] = 1 and g[j][i] = 1. If no edge exists between these two vertices, then g[i][j] = 0 and g[j][i] = 0.Input: N = 6, Edges[] = {{0, 1}, {0, 2}, {0, 3}, {0, 4}, {1, 3}, {2, 3}, {2, 4}, {2, 5}, {3, 5}}, X = 2, Y = 3
Solution
To solve this problem, you can follow these steps:
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Initialize an N x N matrix with all elements as 0. This will represent the adjacency matrix of the graph.
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For each edge in the Edges array, set the corresponding elements in the adjacency matrix to 1. For example, if there is an edge between vertices i and j, set g[i][j] = 1 and g[j][i] = 1.
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After all edges have been inserted, remove the edge between vertices X and Y by setting g[X][Y] = 0 and g[Y][X] = 0.
Here is a Python code snippet that implements these steps:
def modify_matrix(N, Edges, X, Y):
# Step 1: Initialize the adjacency matrix
g = [[0 for _ in range(N)] for _ in range(N)]
# Step 2: Insert all edges
for edge in Edges:
i, j = edge
g[i][j] = 1
g[j][i] = 1
# Step 3: Remove the edge between X and Y
g[X][Y] = 0
g[Y][X] = 0
return g
You can call this function with your inputs to get the modified adjacency matrix:
N = 6
Edges = [(0, 1), (0, 2), (0, 3), (0, 4), (1, 3), (2, 3), (2, 4), (2, 5), (3, 5)]
X = 2
Y = 3
print(modify_matrix(N, Edges, X, Y))
This will print the adjacency matrix after all insertions and the deletion.
Similar Questions
Adjacency Matrix(Graph) - Insertion & DeletionGiven an adjacency matrix g[][] of a graph consisting of N vertices, the task is to modify the matrix after insertion of all edges[] and removal of edge between vertices (X, Y). In an adjacency matrix, if an edge exists between vertices i and j of the graph, then g[i][j] = 1 and g[j][i] = 1. If no edge exists between these two vertices, then g[i][j] = 0 and g[j][i] = 0.Input: N = 6, Edges[] = {{0, 1}, {0, 2}, {0, 3}, {0, 4}, {1, 3}, {2, 3}, {2, 4}, {2, 5}, {3, 5}}, X = 2, Y = 3
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