!752

p {
  testIt("123456789012345678901234567890");
  testIt("-123");
  print("ok!");
}

static void testIt(S val) {
  BigInteger i = bigint(val);
  S s = structure(i);
  print(i);
  print(quote(s));
  O o = safeUnstructure(s);
  print(o);
  assertEquals(i, o);
}