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Time Limit: 5.0 s
Memory Limit: 256 MB
Total points: 100
Hackable ✓
# 11220. Game on the Tree
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The problem was used in the following contests:
第五届中国大学生程序设计竞赛总决赛（CCPC Final 2019）
XX Open Cup named after E.V. Pankratiev, Grand Prix of Beijing
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