M coloring problem

#1


this is the m coloring problem i cant find error here please help

#2

line no 21

has to be
if(vertex==4)
& not if ( vertex = 4 )

#3

I hope I’ve cleared your doubt. I ask you to please rate your experience here
Your feedback is very important. It helps us improve our platform and hence provide you
the learning experience you deserve.

On the off chance, you still have some questions or not find the answers satisfactory, you may reopen
the doubt.