g-hsm:
博客地址:https://www.cnblogs.com/g-hsm/
g-hsm:
博客地址:https://www.cnblogs.com/g-hsm/
CF449D Jzzhu and Numbers 高维前缀和
LUOGU 5296: [北京省选集训2019]生成树计数 Gauss+Matrix-tree
AtCoder hasi's botsuneta programming contest
LUOGU 1984: [SDOI2008]烧水问题 数论递推
LUOGU 2792: [JSOI2008]小店购物 最小树形图
CF741B Arpa's weak amphitheater and Mehrdad's valuable Hoses 并查集 01背包