2018-2019 ACM-ICPC Pacific Northwest Regional Contest (Div. 1)

在北美都出不了线啊？

Problem A

Solved by . 00:11 (+)

Problem B

Solved by . 01:06 (+)

Problem C

Solved by . 00:50 (+)

Problem D

Solved by . 00:16 (+)

Problem E

Solved by . 01:52 (+1)

Problem F

Solved by kblack. 02:30 (+3)

题意：给一堆矩形，求面积异或并。

题解：扫描线扫一扫，线段树区间翻转维护。这每次写这种扫描线都能把 i j 写倒也是把自己牛逼坏了。

Problem G

Solved by . 00:34 (+)

Problem H

Solved by . 01:20 (+)

Problem I

Solved by . 04:22 (+2)

Problem J

Solved by . 00:39 (+)

Problem K

Solved by . 02:31 (+1)

Problem L

Solved by . 00:19 (+1)

Problem M

Solved by . 01:10 (+)