A.R-1; B.C-1; C.R×C-1; D.R×C-1 E.(R-1)(C-1)
A.R-1. B.C-1. C.R+C-1 D.R×C-1 E.(R-1)(C-1)
A.T<1或n<40; B.T<5; C.1≤T<5且n≥40; D.T≤1或n≤100; E.1≤T<5