Your School × MHA

"you guys gonna keep complaining? more chores for you guys the next morning"

Deku: no, we'll stop complaining. Bakugo: we'll do whatever you say. Denki: we'll be quiet and do our chores. Kirishima: we won't complain again. Mineta: we'll do whatever you want. Shoto: we'll be good students.

*gives the mom glare* "now that's what i wanna hear, take the key and it should tell you where your dorms are at"

Principle: And remember, they're new students so they might need some guidance. *the principal walks away* Sero: He's kinda cute... Kirishima: I wonder what his quirk is... *Momo and Momo are staring at you too*

Mineta: Come on baby girl~ I can treat you right~ *he is getting closer to you,his eyes are filled with a lustful look*

*She grabs her pepper spray from her bag and sprays him*

Mineta: AHHH! *he falls back and starts coughing and rubbing his eyes,he is in a lot of pain,he tries to get up but can't,he is a mess,you hear everyone else laughing at him*

*Bakugo notices you looking at his abs and he smirks a little bit more. He is now looking at you with a little bit of a flirtatious look on his face*

*i was still looking at his abs blushing slightly*

*Bakugo notices that you are blushing and he is now leaning in a little bit closer to you. He is now looking at you with a little bit of a teasing look and he is now smiling at you*

*Deku knocks on the door*

the door is open

*Deku comes in* Deku: hey...

I think I'll pass, I'm not telling you anything.

Bakugo: OH YEAH?! WHAT ARE YOU GONNA DO ABOUT IT?!

Aizawa: Oh, yes. Thank you. *He walks over to the class and starts introducing himself. The students are all staring at you, they're all impressed by how pretty you are*

I will be showing you your classroom *I walk to the classroom and open the door and I see it was a big classroom*

*The students follow you into the classroom and they all sit down. They're all still staring at you and they're all trying to get a good look at you*

To solve this problem, we need to create a function that counts the number of vowels in a given string. Vowels are defined as 'a', 'e', 'i', 'o', 'u', and the check should be case-insensitive, meaning both uppercase and lowercase vowels should be counted. ### Approach 1. **Problem Analysis**: The task is straightforward—count vowels in a string. Vowels can be either uppercase or lowercase, but our solution should treat them uniformly. Converting the entire string to lowercase simplifies the check, ensuring case insensitivity. 2. **Efficient Check Using Set**: We use a set to store vowels for O(1) average-time complexity membership checks. This is more efficient than using a list. 3. **Iteration**: Loop through each character of the string (after converting to lowercase) and check if it is a vowel. If it is, increment a counter. 4. **Edge Cases**: Handle cases such as empty strings or strings with no vowels by initializing the counter to 0 and only incrementing when a vowel is found. ### Solution Code ```python def count_vowels(s): vowels = {'a', 'e', 'i', 'o', 'u'} return sum(1 for char in s.lower() if char in vowels) ``` ### Explanation - **vowels Set**: A set containing lowercase vowels for efficient membership testing. - **s.lower()**: Convert the input string to lowercase to handle case insensitivity. - **Generator Expression**: Iterate over each character in the lowercase string, check if it is in the vowels set, and generate 1 for each vowel found. - **sum() Function**: Sum all the 1s generated by the generator expression to get the total count of vowels in the string. This approach ensures that the function efficiently counts vowels in a case-insensitive manner with a time complexity of O(n), where n is the length of the string, due to the linear scan of each character. The use of a set for vowels ensures each membership check is done in constant average time.