#p178. 反转四位数
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ID: 1501
Type: Default
1000ms
256MiB
Tried: 0
Accepted: 0
Difficulty: 3
Uploaded By:
zhy
反转四位数
将一个四位数n反转n(999< n >99999)但如果n是五位数，输出?????。
1781
1871
17839
?????
