fifth edge
graph [ 5 ] . push_back ( make_pair ( 6 , 5 ) ) ; graph [ 6 ] . push_back ( make_pair ( 5 , 5 ) ) ; cout << " Maximum ▁ length ▁ of ▁ cable ▁ = ▁ " << longestCable ( graph , n ) ; return 0 ; }