Middle Element of an Odd-Length List

Return the exact center item of a list that always has an odd number of elements.

lists indexing basic

Write a function `middle_element(values)` that takes a list `values` (which will always have an odd number of elements, i.e., length is odd) and returns the element exactly in the middle of the list.

For example, for `[10, 20, 30, 40, 50]`, the middle element is at index 2, which is 30.

**Function signature:**
```python
def middle_element(values):
    pass
```

- The input list is non-empty and has an odd number of elements.
- You can assume the list contains integers.
- Do not modify the input list.

Return the middle element as is.

Constraints

- 1 <= len(values) <= 10^6
- The length of `values` is always odd.
- Elements are integers within Python's standard range.

Example

```python
>>> middle_element([1, 2, 3])
2
>>> middle_element([5, 6, 7, 8, 9])
7
>>> middle_element([42])
42
```

5 points ~5 min

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Hints

The middle index is the length divided by 2 (using integer division).

For an odd-length list, the middle index is `len(values) // 2`.

Use list indexing to return the element at that index.

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