/in/foo.cc: In function 'int main()':
/in/foo.cc:43:24: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=]
  while (~scanf("%d", &n)) { init();
                        ^
/in/foo.cc:53:27: warning: format '%d' expects argument of type 'int', but argument 2 has type 'long long int' [-Wformat=]
   printf("%d\n", len + tot);
                           ^