Drainage DitchesTime Limit: 1000MS Memory Limit: 10000KTotal Submissions: 78642 Accepted: 30681DescriptionEvery time it rains on Farmer John's fields, a pond forms over B
1001: [BeiJing2006]狼抓兔子Time Limit: 15 Sec Memory Limit: 162 MBSubmit: 24888 Solved: 6318[Submit][Status][Discuss]Description现在小朋友们最喜欢的"喜羊羊与灰太狼",
1934: [Shoi2007]Vote 善意的投票Time Limit: 1 Sec Memory Limit: 64 MBSubmit: 2353 Solved: 1470[Submit][Status][Discuss]Description幼儿园里有n个小朋友打算通过投票来决定睡
题目链接在这里:20182019-acmicpc-pacific-northwest-regional-contest-div-1-en.pdf (codeforces.com)题目大意是给了一个图,要你用最小的代价把小偷封住不让他跑出去,从题意来看是一道很明显的最小割的题目。对于这种非典型的最小割常见思路是拆点。将每个点拆成入点和出点,入点和出点之间连一条边,如果当前为字母,该边的权值即
需要跑多遍的网络流,一个是注意bfs的时候deep不能用memset赋值,一个是每一次网络流的过程都会带来wei和cur的改变1 #include "bits/stdc++.h" 2 using namespace std; 3 typedef long long LL; 4 const LL MAX=1e6+5; 5 LL n,m,s,t,ans; 6 LL tot,head[MAX],adj[
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