459. Repeated Substring Pattern

String String Matching

Problem - Repeated Substring Pattern

Easy

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.

Constraints:

Python3

class Solution:
    def repeatedSubstringPattern(self, s: str) -> bool:
        return (s + s).index(s, 1) < len(s)

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