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PKU v. THU (Preliminary Round 2)
Time Limit: 5 s
Memory Limit: 1536 MB
Total points: 100
# 122. Security Gate
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(日本語)
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The problem was used in the following contest:
The 17th Japanese Olympiad in Informatics Spring Training Camp (JOISC 2017/2018) Day 3
IOI 2024 中国国家队集训@杭州 Day 4
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