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PKU v. THU (Preliminary Round 2)
Time Limit: 1 s
Memory Limit: 2048 MB
# 2897. Circle Bounce
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The problem was used in the following contest:
2021-2022 ICPC North America - Southeast USA Regional - Division 1
2021-2022 ICPC North America - South Central USA Regional - Division 1
2021-2022 ICPC North America - Pacific Northwest Regional Contest - Division 1
2021-2022 ICPC North America - Northeast North America Regional Contest
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