Problem 611. surrounded matrix

A = [1 2 3
     3 2 1]

B = [1 1 1 1 1
     1 1 2 3 1
     1 3 2 1 1
     1 1 1 1 1]

A = 4

B = [ 1 1 1
      1 4 1
      1 1 1]

Solution Comments

Problem Recent Solvers1452

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