zad4a

function v = z4a (A, b)
  n = length(b);
  v=0;
  for i=1:n
    x = 0;
    for j=1:n
      if(j~=i)
        x += A(i,j)^2 * exp(b(j));
      end
    end
    v+=x;
  end
end