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Hack!
Time Limit: 1.0 s
Memory Limit: 256 MB
Hackable ✓
# 7749. A Simple MST Problem
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The problem was used in the following contest:
The 2nd Universal Cup. Stage 10: Harbin
第九届中国大学生程序设计竞赛 哈尔滨站（CCPC 2023 Harbin Site）
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