第一个lowerbound应该改成upperbound,但是改了后14,15还是过不去 by Edgebright @ 2023-05-12 20:11:51
破案了,是多余的部分用A操作调整,所以P = x \* A 要改成P = y \* A by Edgebright @ 2023-05-12 20:17:49