In member function 'void Array::Insert(int)',
    inlined from 'int main()' at /in/foo.cc:51:10:
/in/foo.cc:32:27: warning: 'a.Array::a[0]' may be used uninitialized [-Wmaybe-uninitialized]
   32 |                 while (a[i] < x)
      |                        ~~~^
/in/foo.cc: In function 'int main()':
/in/foo.cc:49:15: note: 'a' declared here
   49 |         Array a(aa, n);
      |               ^