I need help to solve this problem.

Thanks in advance.

Happy Coding :)

I am stuck at one level.I can solve most of 1500 — 1900 difficulty questions but when I solve 1900 — 2400 difficulty questions I have to struggle very much and most of time I am not able to solve what should i do?

I have recently learnt the technique to find strongly connected components in directed graph so i was trying this problem but i can't find solution.

Can you help me solve this problem?

Thanks in advance.

Happy Coding :)