摘要:
Description Nothing is more beautiful than square! So, given a grid of cells, each cell being black or white, it is reasonable to evaluate this grid’s 阅读全文
摘要:
Description 维护一个向量集合,在线支持以下操作:"A x y (|x|,|y| < =10^8)":加入向量(x,y);" Q x y l r (|x|,|y| < =10^8,1 < =L < =R < =T,其中T为已经加入的向量个数)询问第L个到第R个加入的向量与向量(x,y)的点 阅读全文