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LeetCodeEnglishlink:[459. Repeated Substring Pattern](https://leetcode.com/problems/repeated-substring-pattern)

LeetCode link:[459. Repeated Substring Pattern](https://leetcode.com/problems/repeated-substring-pattern), difficulty:**Easy**.

LeetCode Chinese link:[459. 重复的子字符串](https://leetcode.cn/problems/repeated-substring-pattern)

[中文题解](#中文题解)

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

Difficulty:**Easy**

**Input**:`s = "abcabcabcabc"`

-`s` consists of lowercase English letters.

[中文题解](#中文题解)

The key to solving this problem is to see clearly that if`s` can be obtained by repeating the substring, then the starting letter of the substring must be`s[0]`.

Once you understand this, the scope of substring investigation is greatly narrowed.

力扣链接：[459. 重复的子字符串](https://leetcode.cn/problems/repeated-substring-pattern), 难度:**简单**。

给定一个非空的字符串`s` ，检查是否可以通过由它的一个子串重复多次构成。

**输入**:`s = "abcabcabcabc"`

**输出**:`true`

**解释**:`可由子串 "abc" 重复四次构成。 (或子串 "abcabc" 重复两次构成。)`

**输入**:`s = "aba"`

**输出**:`false`

解决本问题的关键是要看清楚一点：通过子串的重复能得到`s`，那么子串的起始字母一定是`s[0]`。想明白了这一点，子串的排查范围就大大缩小了。

LeetCode English link:[459. Repeated Substring Pattern](https://leetcode.com/problems/repeated-substring-pattern)

LeetCode Chinese link:[459. 重复的子字符串](https://leetcode.cn/problems/repeated-substring-pattern)

[中文题解](#中文题解)

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

力扣链接：[459. 重复的子字符串](https://leetcode.cn/problems/repeated-substring-pattern), 难度:**简单**。

Difficulty:**Easy**

给定一个非空的字符串`s` ，检查是否可以通过由它的一个子串重复多次构成。

**Input**:`s = "abcabcabcabc"`

**输入**:`s = "abcabcabcabc"`

**Output**:`true`

**输出**:`true`

**Explanation**:`It is the substring"abc"four times or the substring"abcabc"twice.`

**解释**:`可由子串"abc"重复四次构成。 (或子串"abcabc"重复两次构成。)`

**Input**:`s = "aba"`

**输入**:`s = "aba"`

**Output**:`false`

**输出**:`false`

-`s` consists of lowercase English letters.

[中文题解](#中文题解)

-`s` 由小写英文字母组成

力扣链接：[459. 重复的子字符串](https://leetcode.cn/problems/repeated-substring-pattern), 难度:**简单**。

给定一个非空的字符串`s` ，检查是否可以通过由它的一个子串重复多次构成。

**输入**:`s = "abcabcabcabc"`

**输出**:`true`

**解释**:`可由子串 "abc" 重复四次构成。 (或子串 "abcabc" 重复两次构成。)`

**输入**:`s = "aba"`

**输出**:`false`

解决本问题的关键是要看清楚一点：通过子串的重复能得到`s`，那么子串的起始字母一定是`s[0]`。想明白了这一点，子串的排查范围就大大缩小了。