| rank | solved | A | B | C | D | E | F | G | H | I | J | K |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 7 | 5 | . | O | O | O | . | . | O | Ø | . | O | . |
B
Solved by Henry.
C
Solved by XLor.
点分治，弄出所有 $(\sum,\max)$ 的点，推出式子后二维数点。
D
Solved by Henry.
G
Solved by Henry.
用 $2x$ 和 $2x+1$ 构造。
H
UnSolved by XLor.
写了个四维偏序，T 飞了。
见题解 2019 ICPC 香港现场赛 H. Hold the Line 题解。
J
Solved by Forsaken.
数位 dp。