Home Database Mysql Tutorial POJ 3189 图论技巧题

POJ 3189 图论技巧题

Jun 07, 2016 pm 03:42 PM
Graph Theory Skill enumerate

这题的技巧就是:枚举---旋转卡壳法。 题目大意: 每头牛对每个谷仓有一个喜欢程度,FJ的目的就是要使得每头牛的happy尽可能的相同,求最小的范围。 这题的枚举还是很有技巧的。虽然知道怎么来滑动窗口。。 但是我的网络流EK算法太不给力了! 没办法.. 去学

这题的技巧就是:枚举---旋转卡壳法。

题目大意:

每头牛对每个谷仓有一个喜欢程度,FJ的目的就是要使得每头牛的happy值尽可能的相同,求最小的范围。

这题的枚举还是很有技巧的。虽然知道怎么来滑动窗口。。 但是我的网络流EK算法太不给力了!

没办法.. 去学习了下SAP勉强把这题切掉了= =

#include<iostream>
#include<string>
#include<cstdio>
#include<algorithm>
#define MN 1111
#define INF 0x0FFFFFFF
#define CC(m,what)		memset(m,what,sizeof(m))
#define FOR(i,a,b)		for( int i = (a) ; i = 0 ; i --)
#define SS(a)			scanf("%d",&a)
#define LL(a)			((a) inline T countbit(T n)	{return n?1+countbit(n&(n-1)):0;}
template<class t> inline T sqr(T a)	{return a*a;}
template<class t> inline void checkmin(T &a,T b)	{if(a == -1 || a > b)a = b;}
template<class t> inline void checkmax(T &a,T b)	{if(a dis[v] )
		{
			cur[u]=v;
			mind=dis[v];
		}
		if( (--gap[dis[u]])==0 ) break;
		gap[dis[u]=mind+1]++;
		u=pre[u];
	}
	return maxflow;
}

bool work()
{
 	 int i,j;
	 if( sap()==N ) return true;
	 else return false;
}

int main()
{
 	while( scanf("%d%d",&N,&B)!=EOF )
 	{
	 	   setG();
	 	   int range=INF;
	 	   int r=1,l=1;
	 	   while( l<br>
<br>



</class></class></class></algorithm></cstdio></string></iostream>
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