Strongly Connected Components (Tarjan’s Algorithm) Problem Statement

Given an unweighted directed graph with V vertices and E edges, your task is to identify and print all the strongly connected components (SCCs) within the graph.

Input:

The first line of input contains an integer 'T' denoting the number of test cases. 
For each test case, the first line contains two space-separated integers 'V' and 'E', representing the number of vertices and edges in the graph.
The following 'E' lines each contain two space-separated integers 'a' and 'b', indicating a directed edge from vertex 'a' to 'b'.

Output:

For each test case, print the vertices included in each strongly connected component as space-separated values on a single line per SCC. 
The order of SCCs or the order of vertices within an SCC does not matter.

Example:

Input:
T = 1
V = 4, E = 5
Edges = [(0, 1), (1, 2), (2, 0), (1, 3), (3, 1)]
Output:
[0, 1, 2]
[3]

Constraints:

  • 1 ≤ T ≤ 300
  • 1 ≤ V ≤ 2000
  • V - 1 ≤ E ≤ 2000
  • 0 ≤ a, b < V

Note:

Zero-based indexing is used for vertices. You do not need to output the results; the function handles it internally.
AnswerBot
4mo

Tarjan's Algorithm is used to find strongly connected components in an unweighted directed graph.

  • Tarjan's Algorithm is a depth-first search based algorithm.

  • It uses a stack to keep track of vertices in...read more

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