The quiet ones

Consider this mini social network of fifty people. Each person on the network is represented by an integer. The social network is represented as a matrix AA. If person ii and jj are "friends" then, Aij=1A_{ij}=1 else Aij=0A_{ij}=0. . How many mutual friends do the two people with the least number of mutual friends have?

Details and Assumptions

  • Axx=0A_{xx}=0.
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