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PKU v. THU (Finals)
Time Limit: 1.0 s
Memory Limit: 256 MB
# 9104. Zayin and Forest
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Custom Test
The problem was used in the following contest:
第五届中国大学生程序设计竞赛 厦门站（CCPC 2019 Xiamen Site）
Moscow International Workshops 2019. Day 6. CCPC Contest
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