ICPC 2019 Xuzhou Online Contest

Problem A

Solved by Kilo_5723 && Weaver_zhu. 03:40 (+)

Problem B

Solved by Xiejiadong. 03:23 (+5)

题意：支持两个操作：

• 删掉一个数

• 询问一个数之后没被删掉的第一个数

题解：询问的位置之后，连续的一段被删掉的是会被影响的。

可以发现，答案只会是所有询问和修改位置，或者他们 $+1$ 位置，离线以后离散，用并查集维护即可。

死于 C++14 跑的比 C++11 慢。

Problem C

Solved by Xiejiadong. 00:14 (+1)

傻逼签到题。

死于出题人的英语水平。

Problem D

Solved by Kilo_5723. 01:43 (+)

Problem E

Solved by Weaver_zhu. 00:51 (+1)

Problem F

Unsolved.

Problem G

Solved by Xiejiadong. 01:18 (+2)

Problem H

Unsolved.

Problem I

Solved by Xiejiadong && Kilo_5723. 01:55 (+)

Problem J

Solved by Kilo_5723. 02:49 (+)

Problem K

Solved by Kilo_5723. 02:06 (+2)

Problem L

Solved by Kilo_5723 && Xiejiadong. 04:43 (+)

Problem M

Solved by Weaver_zhu. 02:30 (+)