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Hack!
Time Limit: 1.0 s
Memory Limit: 1024 MB
Hackable ✓
# 7220. The Defense Fence
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Statement
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Custom Test
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The problem was used in the following contest:
ICPCCamp 2016. Day 4. SJTU Dreadnought Contest
Moscow International Workshops 2016. Day 3. SJTU Dreadnought Contest
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