Défi de programmation Count Digits

Problème

Count how many decimal digits n has when written normally, without leading zeros.

Implement count_digits(n).

n: A positive integer.

Return the number of digits.

1 ≤ n ≤ 10¹⁸

Exemple 1

Entrée :
n = 352

Sortie attendue :
expected = 3

Entrée :
long long n = 352;

Sortie attendue :
long long expected = 3;

Entrée :
long n = 352;

Sortie attendue :
long expected = 3;

352 has three digits.

Exemple 2

Entrée :
n = 7

Sortie attendue :
expected = 1

Entrée :
long long n = 7;

Sortie attendue :
long long expected = 1;

Entrée :
long n = 7;

Sortie attendue :
long expected = 1;

A single digit.