Problems
| Problem |
|---|
| A A+B=B |
| B ABBA |
| C 环状字符串 |
| D 照明 |
| E 算法提高 邮票面值设计 |
Submissions
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Contest Clarifications
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Subject: B1. ABBA | Jury @ 2024-1-24 19:45:17
请注意本题数据范围为int类型内