/in/foo.cc: In function 'int main()':
/in/foo.cc:54:57: warning: format '%d' expects argument of type 'int', but argument 2 has type 'll {aka long long int}' [-Wformat=]
  for(i=0;i<N+M-1;i++) printf("%d ",(ll)(C[i].a/NN+0.5)%P);
                                                         ^