Sort characters alphabetically

Return a string with all characters sorted alphabetically by their ASCII value.

sorting string manipulation

Write a function `sort_characters(s: str) -> str` that takes an input string `s` and returns a new string where all characters are sorted in ascending order according to their ASCII values. The sorting should be case-sensitive: uppercase letters (A-Z) come before lowercase letters (a-z). Spaces and punctuation are also sorted by ASCII value. The original string is not modified. If the input string is empty, return an empty string.

Constraints

The input string can contain any printable ASCII characters. The length of the string is between 0 and 1000. The time complexity should be O(n log n), where n is the length of the string.

Example

>>> sort_characters('hello')
'ehllo'
>>> sort_characters('Python')
'Phnoty'
>>> sort_characters('')
''

5 points ~5 min

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Hints

You can convert the string to a list of characters, sort the list, and then join it back into a string.

Python's built-in `sorted()` function sorts by ASCII value by default.

Remember that an empty string should return an empty string.

Test Results

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