@tapasjain01 @Amlesh For the case given with diagonal in a sqaure, we get to choose the points in cartesian plane.Hence, if I choose 1=(0,0) 2=(10,0) 3=(0,10) 4=(1,1). Then after making the graph, I can still add an edge, from 2 to 4. Hence answer will be 0.

@tapasjain01 For the case given with diagonal in a sqaure, we get to choose the points in cartesian plane.Hence, if I choose 1=(0,0) 2=(10,0) 3=(0,10) 4=(1,1). Then after making the graph, I can still add an edge, from 2 to 4. Hence answer will be 0.

For the case given with diagonal in a sqaure, we get to choose the points in cartesian plane.Hence, if I choose 1=(0,0) 2=(10,0) 3=(0,10) 4=(1,1). Then after making the graph, I can still add an edge, from 2 to 4. Hence answer will be 0.