摘要：https://xyix.github.io/posts/?searchfor=%E4%BF%9D%E5%BA%8F%E5%9B%9E%E5%BD%92&postname=isotonic-regression https://github.com/enkerewpo/OI-Public-Libra 阅读全文

摘要：\(-\min\left\{\sum_{u}b_up_u+ \sum_{u, v}c_{u,v}max(0,p_v-p_u-w_{u,v})\right\}\) orz orz 阅读全文

摘要：const int P = 998244353; int power(int a, int b, int c = 1) { for(; b; b >>= 1, a = (ll)a * a % P) if(b & 1) c = (ll)c * a % P; return c; } struct min 阅读全文