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Hack!
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PKU v. THU (Preliminary Round 2)
Time Limit: 2 s
Memory Limit: 512 MB
Hackable ✓
# 4278. GCD vs LCM
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自定义测试
The problem was used in the following contest:
ICPCCamp 2015. Day 2.
Petrozavodsk Winter 2015. Day 3. Chinese Contest
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