向前走莫回头❤
2016年10月19日
【bzoj 4390】 [Usaco2015 dec]Max Flow（树上差分）
摘要： 4390: [Usaco2015 dec]Max Flow Description Farmer John has installed a new system of N−1 pipes to transport milk between the N stalls in his barn (2≤N≤ 阅读全文
posted @ 2016-10-19 17:16 lris0-0 阅读(88) 评论(0) 推荐(0) 编辑
过去的终会化为美满的财富~o( =∩ω∩= )m