[LeetCode] Find the Closest Palindrome 尋找最近的回文串
Given an integer n, find the closest integer (not including itself), which is a palindrome.
The ‘closest‘ is defined as absolute difference minimized between two integers.
Example 1:
Input: "123" Output: "121"
Note:
- The input n is a positive integer represented by string, whose length will not exceed 18.
- If there is a tie, return the smaller one as answer.
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[LeetCode] Find the Closest Palindrome 尋找最近的回文串
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