随笔分类 -  数学---矩阵树定理

[spoj104][Highways] (生成树计数+矩阵树定理+高斯消元)
摘要：In some countries building highways takes a lot of time... Maybe that's because there are many possiblities to construct a network of highways and eng 阅读全文
posted @ 2017-01-09 21:56 keshuqi 阅读(186) 评论(0) 推荐(0)