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Hack!
Day 1
Day 2
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Time Limit: 0.6 s
Memory Limit: 64 MB
Total points: 100
# 4640. 反正切函数的应用
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Custom Test
The problem was used in the following contest:
(China) National Olympiad in Informatics 2001 Day 1
Time Limit: 3s → 0.6s
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