思路:主要就是要把一个每个城市拆为两个点,建一条容量为1,费用为-inf的边,保证每个城市都会被遍历. /*最小费用最大流*/ #include<iostream> #include<cstring> #include<cstring> #include<cmath> #include<cstdio> using namespace std; ; ; struct Edge{ int v; int val; int cost; int next;…
比赛链接: http://vjudge.net/contest/view.action?cid=47643#overview 比赛来源: 2012 ACM/ICPC Asia Regional Hangzhou Online ID Origin Title 0 / 50 Problem A HDU 4410 Boomerang (几何题, ★★★☆☆) 50 / 68 Problem B HDU 4411 Arrest (费用流,待补) 46 / 122 Proble…
http://acm.hdu.edu.cn/showproblem.php?pid=4300 Clairewd’s message Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 4411 Accepted Submission(s): 1676 Problem Description Clairewd is a member of…
Saving HDU Time Limit: 3000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 7194 Accepted Submission(s): 3345 Problem Description 话说上回讲到海东集团面临内外交困,公司的元老也只剩下XHD夫妇二人了.显然,作为多年拼搏的商人,XHD不会坐以待毙的. 一天,当他正在苦思冥想解困良策的…
http://acm.hdu.edu.cn/showproblem.php?pid=3037 Lucas定理模板. 现在才写,noip滚粗前兆QAQ #include<cstdio> #include<cstring> #include<algorithm> using namespace std; typedef long long ll; int jc[100003]; int p; int ipow(int x, int b) { ll t = 1, w = x;…
Special equations Time Limit:1000MS Memory Limit:32768KB 64bit IO Format:%I64d & %I64u Submit Status Practice HDU 4569 Description Let f(x) = a nx n +...+ a 1x +a 0, in which a i (0 <= i <= n) are all known integers. We call f(x) 0 (mod…