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PKU v. THU (Preliminary Round 2)
Time Limit: 1 s
Memory Limit: 2048 MB
# 9064. A Cappella Recording
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The problem was used in the following contest:
The 2023 ICPC Pacific Northwest Regional Contest (Div. 2)
The 2023 ICPC Mid-Central USA Regional Contest (Div. 2)
The 2023 ICPC Southeast USA Regional Contest (Div. 2)
The 2023 ICPC South Central USA Regional Contest (Div. 2)
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