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码力同学 OJ
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Start
2025-01-19 10:31:39
寒假作业(A班)
End
2025-02-08 00:00:00
Contest is over.
Now
2026-03-22 12:11:26
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T. 大小写转换
Description
输出一个英文字母,如果是大写字母,将其转换为小写,如果是小写字母则将其转换为大写
Input
一个字符
Output
一个字符
Examples
Input
a
Output
A
Input
A
Output
a
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Time Limit
1 second
Memory Limit
128 MB
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