rank | solved | A | B | C | D | E | F | G | H | I | J |
---|---|---|---|---|---|---|---|---|---|---|---|
37 | 6 | . | O | O | O | O | . | . | Ø | . | O |
B
Solved by Forsaken.
二次剩余。
C
Solved by Henry.
D
Solved by XLor.
折半搜索。
E
Solved by Forsaken.
并查集。
H
UpSolved by XLor.
主席树。(不知道为啥赛中一直过不了)
J
Solved by XLor.
对称轴一定在某个端点或中点。
关键点抠出来扫描线即可。