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PKU v. THU (Preliminary Round 2)
Time Limit: 4 s
Memory Limit: 128 MB
Total points: 100
# 2593. 甲苯先生的线段树
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Custom Test
The problem was used in the following contest:
2019 天津市代表队选拔赛 Day 2 (TJOI 2019 Day 2)
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