PAT (Advanced Level) Practice — 1136 A Delayed Palindrome （20 分）

题目链接：https://pintia.cn/problem-sets/994805342720868352/problems/994805345732378624 Consider a positive integer N written in standard notation with k+1 digits a​i​​ as a​k​​⋯a​1​​a​0​​ with 0≤a​i​​<10 

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