Problem
Count how many decimal digits n has when written normally, without leading zeros.
Implement count_digits(n).
Input
n: A positive integer.
Output
Return the number of digits.
Constraints
1 ≤ n ≤ 10¹⁸
Examples
Example 1
Input:
n = 352
Expected output:
expected = 3Input:
long long n = 352;
Expected output:
long long expected = 3;Input:
long n = 352;
Expected output:
long expected = 3;Explanation
352 has three digits.
Example 2
Input:
n = 7
Expected output:
expected = 1Input:
long long n = 7;
Expected output:
long long expected = 1;Input:
long n = 7;
Expected output:
long expected = 1;Explanation
A single digit.