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PKU v. THU (Preliminary Round 2)
Time Limit: 1.0 s
Memory Limit: 1024 MB
Hackable ✓
# 7683. Hard Brackets Problem
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The problem was used in the following contest:
The 2nd Universal Cup. Stage 8: Guilin
第九届中国大学生程序设计竞赛 桂林站（CCPC 2023 Guilin Site）
This problem is prepared by
pb0207
.
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