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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.
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
- 1 <= s.length <= 10^4
- s consists of lowercase English letters.
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