function flag=identitymat_alternative(A)
sz=size(A);
n=sz(1);

count=0;
for i=1:1:n
    for j=1:1:n
        if (A(i,j)==1) & (i==j)
            count=count+1;
        end
       if (A(i,j)==0) & (i~=j)
           count=count+1;
       end
   end
end

if count==n^2
    flag=22;
else
    flag=66;
end