2018 ACM-ICPC China Shanghai Metropolitan Invitational Contest

Problem A

Solved by zerol. 01:21 (+)

Problem B

Solved by ultmaster. 00:10 (+)

Problem D

Solved by zerol. 00:36 (+1)

Problem F

Solved by ultmaster. 01:06 (+1)

Problem H

Solved by kblack. 03:01 (+1)

Problem I

Solved by zerol. 03:34 (+1)

Problem J

Solved by ultmaster. 02:05 (+)

Problem K

Solved by kblack. 00:24 (+)

裸矩阵乘法，温暖的签到。（毫无区分度 III）