find degree of connection of two users in social networking site, like linkedin shows us upto 3rd level degree of distance.so the aim is to find minimum degree of connection between two users.
by degree of connection i mean, say user1 is friend with user2 and user2 is also friend with user3
now user1 and user3 are 1st degree of connection with user2
and user3 is 2nd degree of connection with user1
