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Hack!
Time Limit: 2.0 s
Memory Limit: 512 MB
Hackable ✓
# 8330. Count off 3
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The problem was used in the following contest:
The 2nd Universal Cup. Stage 25: Shenzhen
第九届中国大学生程序设计竞赛 深圳站（CCPC 2023 Shenzhen Site）
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