InterviewBit Problems   Cycle in Directed Graph : Unsolved

About the Cycle in Directed Graph : Unsolved category (1)
Fastest solution is Wrong in C++ (1)
Can someone please tell why my code is giving tle? (2)
Dfs Solution for those who are following Pepcoding! (1)
For the love of god , please tell why this is showing:-"Runtime Error. Your submission stopped because of a runtime error. ex: division by zero, array index out of bounds, uncaught exception." (3)
Very Weak Test Cases. Solve this one from GFG for better test cases (1)
Wrong trivial test case (1)
Testing with your custom test is nightmare (1)
Why is this not correct (2)
Wrong simple test (1)
Wrong judgement by IB (1)
Incomplete testcases (1)
Don't know why it is showing run time error here? (2)
Wrong/Weak test case (1)