Initials From a Name

Problema

Take the first letter of each word in full_name, uppercase it, and join the letters. Words are separated by one or more spaces.

Implement initials(full_name).

full_name: A name made of letters and spaces.

Return the initials, for example "ADL".

1 ≤ length of full_name ≤ 200; it contains at least one letter

Exemplo 1

Entrada:
full_name = "Ada Lovelace"

Saída esperada:
expected = "AL"

Entrada:
std::string full_name = "Ada Lovelace";

Saída esperada:
std::string expected = "AL";

Entrada:
string full_name = "Ada Lovelace";

Saída esperada:
string expected = "AL";

A from Ada and L from Lovelace: "AL".

Exemplo 2

Entrada:
full_name = "grace  brewster  hopper"

Saída esperada:
expected = "GBH"

Entrada:
std::string full_name = "grace  brewster  hopper";

Saída esperada:
std::string expected = "GBH";

Entrada:
string full_name = "grace  brewster  hopper";

Saída esperada:
string expected = "GBH";

Extra spaces don't matter; the initials are uppercased: "GBH".

Tente sozinho primeiro e depois abra uma dica de cada vez.

Dica 1

Each word contributes exactly one character: its first letter.

Dica 2

Traverse the name while tracking when a new word starts after spaces.

Dica 3

Watch for multiple spaces in a row so you only take one initial per word.

Complexidade esperada

O(n) time, O(1) extra space

Este desafio foi adaptado para o CodeUtility. Siga o enunciado e as restrições acima.