#459

Repeated Substring Pattern

pupil · 455 · lc easy +26 · verified · 47.9% accepted · 6,841 likes · top 33%

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Description

Given a string s, check whether it can be written as a shorter pattern repeated at least twice consecutively (using only proper substrings of s). Return true if so, false otherwise.

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.

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