/in/foo.cc: In member function 'void s1::solve()':
/in/foo.cc:50:20: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
   printf("%d\n",ans);
                    ^
/in/foo.cc: In member function 'void s2::solve()':
/in/foo.cc:77:22: warning: format '%lld' expects argument of type 'long long int', but argument 2 has type 'int' [-Wformat=]
   printf("%lld\n",ans);
                      ^