/in/foo.cc: In function 'int main()':
/in/foo.cc:17:22: warning: format '%ld' expects argument of type 'long int*', but argument 2 has type 'long long int*' [-Wformat=]
     scanf("%ld\n", &n);
                      ^
/in/foo.cc:30:26: warning: format '%ld' expects argument of type 'long int*', but argument 2 has type 'long long int*' [-Wformat=]
         scanf("%ld",val+i);
                          ^