Can you write Python code to implement this?

Green Team answered on June 26, 2023 Popularity 8/10 Helpfulness 1/10

answer Can you write Python code to implement this?

Can you write Python code to implement this?

Comment

from collections import defaultdict

def dfs(graph, vertex, visited, stack):
    visited[vertex] = True
    for neighbor in graph[vertex]:
        if not visited[neighbor]:
            dfs(graph, neighbor, visited, stack)
    stack.append(vertex)

def get_sink_components(graph):
    # Step 1: Reverse the edges of the graph to obtain GR
    reversed_graph = defaultdict(list)
    for vertex in graph:
        for neighbor in graph[vertex]:
            reversed_graph[neighbor].append(vertex)

    # Step 2: Run DFS on GR to determine finishing times
    visited = defaultdict(bool)
    stack = []
    for vertex in reversed_graph:
        if not visited[vertex]:
            dfs(reversed_graph, vertex, visited, stack)

    # Step 4: Sort vertices based on finishing times
    sorted_vertices = sorted(stack, reverse=True)

    # Step 5: Identify sink components in G
    sink_components = []
    visited = defaultdict(bool)
    for vertex in sorted_vertices:
        if not visited[vertex]:
            component = []
            dfs(graph, vertex, visited, component)
            sink_components.append(component)

    return sink_components

# Example usage:
# Define the graph as an adjacency list
graph = {
    1: [2],
    2: [3, 4],
    3: [],
    4: [5],
    5: [],
    6: [4, 7],
    7: [],
    8: [6, 9],
    9: []
}

sink_components = get_sink_components(graph)
print("Sink components of G:")
for component in sink_components:
    print(component)

Popularity 8/10 Helpfulness 1/10 Language python

Source: chat.openai.com

Tags: python

Link to this answer
Share Copy Link

Contributed on Jun 26 2023

Green Team

0 Answers Avg Quality 2/10

Can you write Python code to implement this?

Contents

More Related Answers

Can you write Python code to implement this?

Grepper

Documentation

Social

Legal

Contact

Oops, You will need to install Grepper and log-in to perform this action.