Repeated Substring Pattern

Easy

Given a string s, return true if it can be built by repeating a substring of it multiple times.

Example 1

Input:  s = "abab"
Output: true

Example 2

Input:  s = "aba"
Output: false

Example 3

Input:  s = "abcabcabc"
Output: true

Constraints

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