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PKU v. THU (Preliminary Round 2)
Time Limit: 1.0 s
Memory Limit: 64 MB
Hackable ✓
# 9457. Prime Set
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The problem was used in the following contest:
The 3rd Universal Cup. Stage 12: Qinhuangdao
第三届中国大学生程序设计竞赛 秦皇岛站（CCPC 2017 Qinhuangdao Site）
Moscow International Workshops 2017. Day 3. CCPC Regional 1
Osijek Competitive Programming Camp Fall 2023. Day 4. Qinhuangdao Contest (CCPC 2017)
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