跃迁引擎启动

rank solved A B C D E F G H I J
15 8 O O O O O ! O . Ø O

Solved by Henry.

B

Solved by Forsaken.

Solved by XLor.

Solved by XLor.

Solved by XLor.

Solved by XLor.

I

UpSolved by XLor.

J

Solved by Henry.

$dp$ + 组合数学。