Let there be 10 users of facebook, say 1, .. , 10. Take as input a list of "friendships" of the form (each line is one "friendship between "user 1 and "user 2"):
1 - 2
5 - 9
.
.
You can store a list of friendships using two arrays (a max of 100 friendships).
Take as input a user, say k, out of the 10 users. Print the other users (other than k or friends of k) in decreasing order of common friends of k.
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