/in/foo.cc: In function 'int main()':
/in/foo.cc:73:13: warning: 'sl1.Seplist::n' may be used uninitialized in this function [-Wmaybe-uninitialized]
     Seplist sl1(n);
             ^~~
/in/foo.cc:81:13: warning: 'sl2.Seplist::n' may be used uninitialized in this function [-Wmaybe-uninitialized]
     Seplist sl2(n);
             ^~~
/in/foo.cc:51:17: warning: 'T.Seplist::n' may be used uninitialized in this function [-Wmaybe-uninitialized]
         Seplist T;
                 ^