- Difficulty: Hard
- Tags: LeetCode, Hard, Bit Manipulation, Hash Table, String, leetcode-1542, O(n), O(1)
Problem
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.
Constraints:
1 <= s.length <= 105
s
consists only of digits.