Repeated Substring Pattern

Given a string s, check if it can be constructed by taking a substring of it and appending multiple copies of the substring together.

Example 1:

Input: s = "abab"
Output: true
Explanation: It is the substring "ab" twice.

Example 2:

Input: s = "aba"
Output: false

Example 3:

Input: s = "abcabcabcabc"
Output: true
Explanation: It is the substring "abc" four times or the substring "abcabc" twice.

Solution

class Solution:
    def repeatedSubstringPattern(self, s: str) -> bool:
        l = len(s)
        for i in range(0, l // 2):
            ss = s[0:i+1]
            if ss * (len(s) // len(ss)) == s:
                return True
        return False