SPOJ 7001. Visible Lattice Points (莫比乌斯反演)
摘要:
7001. Visible Lattice PointsProblem code: VLATTICEConsider a N*N*N lattice. One corner is at (0,0,0) and the opposite one is at (N,N,N). How many lattice points are visible from corner at (0,0,0) ? A point X is visible from point Y iff no other lattice point lies on the segment joining X and Y.Input 阅读全文
posted @ 2013-08-21 21:14 kuangbin 阅读(1655) 评论(2) 推荐(0) 编辑