[USACO09JAN]全流Total Flow】的更多相关文章

P2936 [USACO09JAN]全流Total Flow 题目描述 Farmer John always wants his cows to have enough water and thus has made a map of the N (1 <= N <= 700) water pipes on the farm that connect the well to the barn. He was surprised to find a wild mess of different…
题目描述 Farmer John always wants his cows to have enough water and thus has made a map of the N (1 <= N <= 700) water pipes on the farm that connect the well to the barn. He was surprised to find a wild mess of different size pipes connected in an appa…
题目描述 Farmer John always wants his cows to have enough water and thus has made a map of the N (1 <= N <= 700) water pipes on the farm that connect the well to the barn. He was surprised to find a wild mess of different size pipes connected in an appa…
题目描述 Farmer John always wants his cows to have enough water and thus has made a map of the N (1 <= N <= 700) water pipes on the farm that connect the well to the barn. He was surprised to find a wild mess of different size pipes connected in an appa…
题目描述 Farmer John always wants his cows to have enough water and thus has made a map of the N (1 <= N <= 700) water pipes on the farm that connect the well to the barn. He was surprised to find a wild mess of different size pipes connected in an appa…
题目链接:https://www.luogu.org/problemnew/show/P2936 菜 #include <queue> #include <cstdio> #include <cstring> #include <iostream> #include <algorithm> using namespace std; const int maxn = 10000; const int inf = 1e9; int n, m, s,…
题 裸题不多说,在网络流的练习题里,你甚至可以使用暴力. #include<bits/stdc++.h> using namespace std; typedef long long ll; typedef pair<int,int> pii; template<typename T>inline :;} template<typename T>inline :;} template<typename T>inline T _min(T A,T…
Farmer John always wants his cows to have enough water and thus has made a map of the N (1 <= N <= 700) water pipes on the farm that connect the well to the barn. He was surprised to find a wild mess of different size pipes connected in an apparentl…
3396: [Usaco2009 Jan]Total flow 水流 Time Limit: 1 Sec  Memory Limit: 128 MBSubmit: 45  Solved: 27[Submit][Status] Description   Input 第1行输入N,之后N行每行描述一条水管,前两个英文字母表示水管的两端(大小写字母是不一样的),后一个整数表示水管的流量,流量不会超过1000. Output 一个整数,表示总流量. Sample Input 5 A B 3 B C 3…
  当一个数据包到达网卡的时候,首先要经过内核Openvswitch.ko,流表Flow Table在内核中有一份,通过key查找内核中的flow table,即可以得到action,然后执行action之后,直接发送这个包,只有在内核无法查找到流表项的时候,才会到用户态查找用户态的流表.仅仅查找内核中flow table的情况被称为fast path.     第一步:从数据包中提取出key   实现函数为int ovs_flow_key_extract(const struct ip_tun…