Hello Codeforces!!

I was doing the question 1242B - 0-1 MST. Similar type of questions are 920E - Connected Components? 190E - Counter Attack.

In short, these questions ask you to calculate the number of connected components in the compliment of graph.

I have read the editorials but I am a little stuck with the problem.

I would be grateful if someone could help me out with this.

TIA