problem0564

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Published: Jul 25, 2019 License: MIT Imports: 1 Imported by: 0

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564. Find the Closest Palindrome

题目

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:

  1. The input n is a positive integer represented by string, whose length will not exceed 18.
  2. If there is a tie, return the smaller one as answer.

解题思路

见程序注释

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