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Hack!
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PKU v. THU (Preliminary Round 2)
Time Limit: 6 s
Memory Limit: 1024 MB
# 5588. Eroding Pillars
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The problem was used in the following contest:
2022-2023 ICPC North America - Mid-Atlantic USA Regional - Division 1
2022-2023 ICPC North America - Southeast USA Regional - Division 1
2022-2023 ICPC North America - South Central USA Regional - Division 1
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