Please read below Carefully
Input Format for TestCases Files
First Line contains number of vertices and next lines contain Directed edges from vertex u to vertex v separated by a " "(space).
n
u v
u v
u v
u v
u v
Refer the ExampleTestCase.txt File in TestCases Directory to Get the Clear Idea.
Put the Test Cases file in Test Cases folder. Check the Test Cases from the TestTopoSort Class (as it contains the main() method)