That's not how vectors work. Read the documentation or make a search about this. Also, please format your code as explained there, or it's very discomfortable to read. See there: https://docs.codewars.com/training/troubleshooting/#post-discourse

id like to ask you again to read how to use code blocks. Did you read the link on code formatting I posted in one of your previous questions? here it is, once again: https://docs.codewars.com/references/markdown#code-block

The line you show has a syntax error and unmatched parentheses.

Write a function that checks if a given string (case insensitive)

Print the input when some test case fails, so you can debug your code.

Please use code blocks when posting code: https://docs.codewars.com/references/markdown#code-block

About your problem: please read description once again, carefully, and check if your solution conforms to all requirements. You can also ceck what input causes your solution to fail (see how: https://docs.codewars.com/training/troubleshooting#print-input), and recreate the failing tet in your local IDE, and debug through it.

Mark your post as having spoiler content next time, read this: https://docs.codewars.com/training/troubleshooting/#post-discourse

The line vect[i] = m % 10; is wrong. The vector is empty, and you cannot access i-th element of an empty vector.

Please read this: https://docs.codewars.com/training/troubleshooting/