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Hack!
Time Limit: 4 s
Memory Limit: 1024 MB
Hackable ✓
# 6502. Disjoint Set Union
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Custom Test
The problem was used in the following contest:
第八届中国大学生程序设计竞赛总决赛（CCPC Final 2022）
The 1st Universal Cup. Stage 17: Guangzhou
This problem is prepared by
Qingyu
.
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