摘要: $des$ $sol$ $f_{i, j, k} => a => [1, i], b => [1, j], a_i = b_j | a_i != b_j , a_i => 0 / 1 $$g_{i, j, k} => a => [1, i], b => [1, j], a_i = b_j, a_i 阅读全文
posted @ 2018-10-31 10:12 xayata 阅读(132) 评论(0) 推荐(0) 编辑