kZjPBD.jpg
2019年11月18日
E - GuGuFishtion HDU - 6390 （欧拉函数，反演）
摘要： Today XianYu is too busy with his homework, but the boring GuGu is still disturbing him!!!!!! At the break time, an evil idea arises in XianYu's mind. 阅读全文
posted @ 2019-11-18 11:45 Through_The_Night 阅读(171) 评论(0) 推荐(0) 编辑