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Given a string n representing an integer, return the closest integer (not including itself), which is a palindrome. If there is a tie, return the smaller one.

The closest is defined as the absolute difference minimized between two integers.

 

Example 1:

Input: n = "123"
Output: "121"

Example 2:

Input: n = "1"
Output: "0"
Explanation: 0 and 2 are the closest palindromes but we return the smallest which is 0.

 

Constraints:

  • 1 <= n.length <= 18
  • n consists of only digits.
  • n does not have leading zeros.
  • n is representing an integer in the range [1, 1018 - 1].

class Solution { public String nearestPalindromic(String n) { } }