/in/foo.cc: In function 'int main()':
/in/foo.cc:51:20: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
  printf("%d\n",f[n]);
                    ^
/in/foo.cc:36:7: warning: unused variable 'now' [-Wunused-variable]
  R II now=1;
       ^~~