/in/foo.cc: In function 'int main()':
/in/foo.cc:21:59: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
  printf("%d",(multiply(m,n)-((m*multiply(m-1,n-1))+p)%p)%p);
                                                           ^