In a party N people are invited. Some person can engage with some other person in party. You are given a matrix of 'Y' and 'N' . If the (i,j) is 'Y' then person i can engage with person j throughout the day and if (i,j) is 'N' then person i cannot engage with person j throughout the day. You have to find maximum number of people engaged in party.
Note : if a person is engaged with other person then he is engaged whole day. he can't switch in between.
Ex.
N=4 N Y N N Y N Y Y N Y N N N Y N N Ans is = 2 because 2 nd person can engaged with one other person only (2,1) or (2,3) or (2,4)
Please help me with some ideas for this question .
