hkpls:
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LG_3457_[POI2007]POW-The Flood LG_3459_[POI2007]MEG-Megalopolis CF580D_Kefa and Dishes Luogu_2434_[SDOI2005]区间 要怪就怪我菜的该死 初等数论-Base-1(筛法求素数，欧拉函数，欧几里得算法)
LG_3457_[POI2007]POW-The Flood
LG_3459_[POI2007]MEG-Megalopolis
CF580D_Kefa and Dishes
Luogu_2434_[SDOI2005]区间
要怪就怪我菜的该死
初等数论-Base-1(筛法求素数，欧拉函数，欧几里得算法)