/in/foo.cc: In function 'int main()':
/in/foo.cc:186:72: error: invalid operands of types 'int' and 'int [1048581]' to binary 'operator-'
  186 |                         if (*lower_bound(vis2 + 1, vis2 + 1 + l2, aim) - vis2 == aim) {
      |                             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~~~~
      |                             |                                            |
      |                             int                                          int [1048581]