/in/foo.cc: In function 'int main()':
/in/foo.cc:37:38: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'int' [-Wformat=]
   printf("Case #%ldd: %lld\n",now,ans);
                                      ^
/in/foo.cc:29:6: warning: unused variable 'tot' [-Wunused-variable]
   ll tot=0;
      ^~~