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欢迎报名第四届北京大学游戏对抗邀请赛!

Wa的兄弟们请戳

Posted by lixintong at 2014-05-29 11:40:46 on Problem 2635
stictly less, 素数要严格小于L啊!!!
因为多打了一个等号WA了半个小时。。

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