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在小小的奶龙山里面挖呀挖呀挖
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ID
16878
Time
5000ms
Memory
512MiB
Difficulty
4
Tags
洛谷原创
O2优化
最近公共祖先 LCA
素数判断,质数,筛法
洛谷月赛
# Submissions
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Hydro
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