7.30
2019 Hang electric multi-school third
binary tree line weights + + dp: 1004 Distribution of books
7.29
2019 Hang electric multi-school third
play table to find the law: 1006 Fansblog
half + Fenwick tree: 1007 Find the answer
2019 Hang electric multi-school third
binary tree line weights + + dp: 1004 Distribution of books
2019 Hang electric multi-school third
play table to find the law: 1006 Fansblog
half + Fenwick tree: 1007 Find the answer