创建回文数（pn）（拓展-01）
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Background
Description
注意：负数时注意把负号放后面，所以其就不是数字。
Format
Input
Output
Samples
12345
1234554321
-12345
-1234554321-
Limitation
1s, 1024KiB for each test case.
厦门科技特长生2024年暑假集训考题
- Status
- Done
- Rule
- ACM/ICPC
- Problem
- 12
- Start at
- 2024-8-25 0:00
- End at
- 2024-9-9 0:00
- Duration
- 360 hour(s)
- Host
-
paifuture
- Partic.
- 7