LeetCode 3813: Vowel-Consonant Score

Meta Data

#

Difficulty: easy First Attempt: 2026-01-18

• Submissions: Accepted (first try)

Approach

#

The string also contains spaces and digits; only letters count (String Template 4). With v vowels and c consonants, the score is v // c when c > 0, otherwise 0.

My Solution

#

I originally checked letters with 97 <= ord(c) <= 97 + 26 (the upper bound actually lets in {, which never appears) and used floor(v / c). Here with isalpha and integer division:

class Solution:
    def vowelConsonantScore(self, s: str) -> int:
        v = sum(ch in "aeiou" for ch in s)
        c = sum(ch.isalpha() and ch not in "aeiou" for ch in s)
        return v // c if c else 0

Complexity

#

Time O(n), space O(1).

Mistakes to Avoid

#

• Spaces and digits are not consonants.
• Do not divide when there are no consonants.

Interview Explanation

#

I count only letters, vowels and consonants separately. With no consonants I return 0; otherwise the integer quotient. Time O(n).