Distinct Echo Substrings
Return the number of distinct non-empty substrings of text that can be written as the concatenation of some string with itself (i.e., it can be written as a + a where a is some string).
Example 1
Input
text = "abcabcabc"Output
3The 3 substrings are "abcabc", "bcabca" and "cabcab".
Example 2
Input
text = "leetcodeleetcode"Output
2The 2 substrings are "ee" and "leetcodeleetcode".
Constraints
- 1 <= text.length <= 2000
- text has only lowercase English letters.