See this question, a question that came in a geeks for geeks contest a few months ago, at that time I didn't know much about graphs so skipped it, after studying some graphs I again tried to solve it but the question seems difficult to solve!!! I would be really happy if anybody can help me with this question! Thank you... The problem the question B that you see on clicking the click.

I have noticed that the Indians are really good at teaching, but there are very few Youtube channels of coders in India who are Master or Grandmaster at Codeforces, after making 2-3 youtube videos many ones move to Unacademy which is a paid platform and only rich people can afford, and also even if some have enough money they won't go for learning by paying that huge money per month. So I feel like Indians are hanker after money, they already got a job that pays them lakhs rupees per month but even after that they just go to unacademy to teach! Why can't they teach on Youtube, more people will get to know you, more people will love you!!!