2025-08-16 09:42:27 +0000 UTC

Check If String Is a Prefix of Array
Categories:
Tags:

Code

class Solution:
    def isPrefixString(self, s: str, words: List[str]) -> bool:
        i = 0
        length = len(s)
        for word in words:
            if i >= length:
                return True
            word_length = len(word)
            if word_length > length - i:
                return False
            if word != s[i:i+word_length]:
                return False
            i += word_length
        return i >= length