摘要: 题目链接:https://ac.nowcoder.com/acm/contest/5666/D 题目大意:给定一实正定二次型矩阵\(A\),求当\(\sum_{i=1}^n\sum_{j=1}^{n}A_{ij}x_ix_j\le 1\),即\(x^TAx \le 1\)时,\(\sum_{i=1} 阅读全文
posted @ 2020-07-13 01:38 DeaphetS 阅读(591) 评论(3) 推荐(1) 编辑