Abbreviate Name

Transform a full name into an abbreviated form with initials and surname.

strings formatting split

Write a function `abbreviate_name(name: str) -> str` that takes a full name as a string containing one or more words separated by single spaces. The function should return a string where all words except the last one are reduced to their first uppercase letter followed by a period and a space, and the last word is capitalized.

- Preserve the original order of words.
- Each initial should be the uppercase first character of the corresponding word.
- The last word should be returned with its first character uppercase and the rest of the word lowercase (if it is already fully uppercase, convert it to title case).
- If the input has only one word, return that word in title case (no initials).
- The input will not be empty and will not contain leading/trailing spaces.

Examples:
- `abbreviate_name("John Doe")` → `"J. Doe"`
- `abbreviate_name("ALICE Smith")` → `"A. Smith"`
- `abbreviate_name("Robert James Miller")` → `"R. J. Miller"`
- `abbreviate_name("Madonna")` → `"Madonna"`

Implement the function exactly as specified.

Constraints

- Input string length is between 1 and 100 characters.
- The name consists of uppercase/lowercase letters and spaces only.
- Words are separated by exactly one space.
- No leading or trailing spaces.
- Time complexity: O(n), where n is the length of the input string.

Example

>>> abbreviate_name("John Doe")
'J. Doe'
>>> abbreviate_name("ALICE Smith")
'A. Smith'
>>> abbreviate_name("Robert James Miller")
'R. J. Miller'
>>> abbreviate_name("Madonna")
'Madonna'

10 points ~15 min

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Hints

Use `split()` to separate the name into words.

Take the first character of each word except the last and uppercase it.

For the last word, use `.capitalize()` to convert to title case.

Join the initials with a period and space, then append the last name.

Test Results

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