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2023 沙东省队民间互唱由 ShanLunjiaJian 主办，欢迎大家投题！
系统测试赛（IOI）
Contest Ended
Ruleset: IOI
- Test full dataset
- Scoreboard unavailable
- Penalty: 0 minute(s)
- Submission limit / problem: 50
Virtual Contest
The virtual contest is in progress. You can start your participation.