西安毛子律技大枣XIDIANUNIVERSITY解把A,B分块成00102110002BuEB :0B21B224110-12解 把A,B分块成 = 0 1 1 0 0 1 1 0 A 0 0 0 0 1 1 − 1 2 , = E E O A1 − − − = 1 1 2 0 1 0 4 1 1 2 0 1 1 0 1 0 B ( ) = B11 E B21 B22