if (-2 <= b && b <= 2) {
      switch ((int) b) {
        case 0:
          return (k == 0) ? 1 : 0;
        case 1:
          return 1;
        case (-1):
          return ((k & 1) == 0) ? 1 : -1;
        case 2:
          return (k < Long.SIZE) ? 1L << k : 0;
        case (-2):
          if (k < Long.SIZE) {
            return ((k & 1) == 0) ? 1L << k : -(1L << k);
          } else {

{!../../docs_src/bigger_applications/app/main.py!}
```

### Include the `APIRouter`s for `users` and `items`

Now, let's include the `router`s from the submodules `users` and `items`:

```Python hl_lines="10-11" title="app/main.py"
{!../../docs_src/bigger_applications/app/main.py!}
```

/// info

`users.router` contains the `APIRouter` inside of the file `app/routers/users.py`.

   * Collections#frequency}) can cause major performance problems.
   *
   * <p>The returned set's {@link Object#toString} method returns a shorthand form of the set's
   * contents, such as {@code "[1..100]}"}.
   *
   * @throws IllegalArgumentException if neither this range nor the domain has a lower bound, or if
   *     neither has an upper bound
   */
  public ImmutableSortedSet<C> asSet(DiscreteDomain<C> domain) {

		totalSize int64
		partSize  int64
		partIndex int
		err       error
	}{
		// partSize is 0, returns error.
		{10, 0, 1, errPartSizeZero},
		// partIndex is 0, returns error.
		{10, 1, 0, errPartSizeIndex},
		// Total size is -1, returns error.
		{-2, 10, 1, errInvalidArgument},
	}

	for i, testCaseFailure := range testCasesFailure {

                assertEquals(11, list.getAllPageCount());
                assertEquals(1045, list.getCurrentEndRecordNumber());
                assertEquals(11, list.getCurrentPageNumber());
                assertEquals(1001, list.getCurrentStartRecordNumber());
                assertEquals(offset, list.getOffset());
                assertEquals(100, list.getPageSize());
                assertEquals(1000, list.getStart());

{!../../docs_src/bigger_applications/app/main.py!}
```

### Incluir o `APIRouter`s para `usuários` e `itens`

Agora, vamos incluir os `roteadores` dos submódulos `usuários` e `itens`:

```Python hl_lines="10-11" title="app/main.py"
{!../../docs_src/bigger_applications/app/main.py!}
```

/// info | "Informação"

`users.router` contém o `APIRouter` dentro do arquivo `app/routers/users.py`.

 *   </li>
 * <li>a hyphen usually precedes a qualifier, and is always less important than digits/number, for example
 *   {@code 1.0.RC2 < 1.0-RC3 < 1.0.1}; but prefer {@code 1.0.0-RC1} over {@code 1.0.0.RC1}, and more
 *   generally: {@code 1.0.X2 < 1.0-X3 < 1.0.1} for any string {@code X}; but prefer {@code 1.0.0-X1}
 *   over {@code 1.0.0.X1}.</li>
 * </ul>
 *

{!../../docs_src/bigger_applications/app/main.py!}
```


### Die `APIRouter` für `users` und `items` inkludieren

Inkludieren wir nun die `router` aus diesen Submodulen `users` und `items`:

```Python hl_lines="10-11" title="app/main.py"
{!../../docs_src/bigger_applications/app/main.py!}
```

/// info

`users.router` enthält den `APIRouter` in der Datei `app/routers/users.py`.

    assertThat(verifier.verify("192.168.1.1", session)).isTrue()
    assertThat(verifier.verify("::ffff:192.168.1.1", session)).isTrue()
    assertThat(verifier.verify("0:0:0:0:0:FFFF:C0A8:0101", session)).isTrue()
  }

  @Test fun generatedCertificate() {
    val heldCertificate =
      HeldCertificate.Builder()
        .commonName("Foo Corp")
        .addSubjectAlternativeName("foo.com")

    setUp(parameters.first, parameters.second)
    cache.close()
    generateSomeGarbageFiles()
    createJournalWithHeader(DiskLruCache.MAGIC, "1", "101", "2", "")
    createNewCache()
    assertGarbageFilesAllDeleted()
  }

  @ParameterizedTest
  @ArgumentsSource(FileSystemParamProvider::class)