#1542
Find Longest Awesome Substring
hard · verified · 46.6% accepted · 890 likes · top 31%
hash table · string · bit manipulation
Description
You are given a string s. An awesome substring is a non-empty substring of s such that we can make any number of swaps in order to make it a palindrome.
Return the length of the maximum length awesome substring of s.
Example 1:
Input: s = "3242415"
Output: 5
Explanation: "24241" is the longest awesome substring, we can form the palindrome "24142" with some swaps.
Example 2:
Input: s = "12345678"
Output: 1
Example 3:
Input: s = "213123"
Output: 6
Explanation: "213123" is the longest awesome substring, we can form the palindrome "231132" with some swaps.
Solution