Path Existence in Directed Graph

Given a directed and unweighted graph characterized by vertices 'V' and edges 'E', determine if a path exists from a specified 'source' vertex to a 'destination' vertex. The edges are represented in a 2-dimensional array 'Edges' where each entry Edges[i][0] to Edges[i][1] represents a direct connection.

Example:

Input:
Vertices: 4, Edges: 3
Edge List: [[0, 1], [1, 2], [2, 3]]
Source: 0, Destination: 2
Output:
true
Explanation:

There is a path from the source (0) to the destination (2) following 0 -> 1 -> 2.

Input Format:

The first line contains an integer ‘T’, representing the number of test cases.
The first line of each test case contains two integers 'V' and 'E'.
The subsequent 'E' lines contain two integers per line, describing the directed edge from 'Edges[i][0]' to 'Edges[i][1]'.
The last line of each test case specifies two integers, the 'source' and 'destination' vertices.

Output Format:

Output 'true' or 'false' for each test case regarding the existence of a path from the 'source' to 'destination', each on a new line.

Constraints:

  • 1 <= T <= 5
  • 1 <= V, E <= 10^5
  • 0 <= Edges[i][0], Edges[i][1] < V
  • 0 <= source, destination < V
  • Time Limit: 1 sec

Note:

Implement the function; there is no need to handle input/output operations directly, as they are managed elsewhere.

AnswerBot
1y

The task is to check if there exists a path from a given source vertex to a destination vertex in a directed and unweighted graph.

  • Read the number of test cases.

  • For each test case, read the number of v...read more

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