use "sequence_queries.g";
use "sequence_mutation.g";
use "basic_models.g";
use "iterator_models.g";

fun main() -> int@
{
  let n = 3;
  let a = new int[n];
  let b = new int[n];

  for (let i = 0; i != n; ++i) {
    a[i] = i;
    b[i] = n - 1 - i;
  }

  swap_ranges(a, a + n, b);

  for (let i = 0; i != n; ++i) {
    if (b[i] != i) return -1;
    if (a[i] != n - 1 - i) return -1;
  }
  
  return 0;
}