/in/foo.cc: In function 'int main()':
/in/foo.cc:86:45: warning: format '%ld' expects argument of type 'long int', but argument 2 has type 'int' [-Wformat=]
  printf("%ld\n%ld\n",ans,maxv(1)?maxv(1)+1:0);
                                             ^
/in/foo.cc:86:45: warning: format '%ld' expects argument of type 'long int', but argument 3 has type 'int' [-Wformat=]