/in/foo.cc: In function 'void work()':
/in/foo.cc:66:23: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
   66 |         else printf("%d",ans);
      |                      ~^  ~~~
      |                       |  |
      |                       |  long long int
      |                       int
      |                      %lld