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套模板 不好玩

Posted by liyuweihuo at 2015-10-05 10:58:46 on Problem 2195
#include<algorithm>
#include<iostream>
#include<cstring>
#include<cstdlib>
#include<cstdio>
#include<string>
#include<cmath>
#include<vector>
#include<stack>
#include<queue>
#include<map>
#include<set>
using namespace std;
const int Inf=0x3f3f3f3f;
const int M=105;
int n,m,hh,mm;
int mp[M][M],lx[M],ly[M],match[M],vx[M],vy[M];
typedef struct
{
	int x,y;
}node;
node HH[M],MM[M];
int hungery(int u)
{
	int i;
	vx[u]=1;
	for(i=0;i<hh;i++)
	{
		if(!vy[i]&&lx[u]+ly[i]==mp[u][i])
		{
			vy[i]=1;
			if(match[i]==-1||hungery(match[i]))
			{
				match[i]=u;
				return 1;
			}
		}
	}
	return 0;
}
void KM()
{
	int i,j,z;
	for(i=0;i<mm;i++)
	lx[i]=-Inf;
	for(i=0;i<mm;i++)
	for(j=0;j<hh;j++)
	lx[i]=max(lx[i],mp[i][j]);
	memset(match,-1,sizeof(match));
	memset(ly,0,sizeof(ly));
	for(i=0;i<mm;i++)
	{
		while(1)
		{
			memset(vx,0,sizeof(vx));
			memset(vy,0,sizeof(vy));
			if(hungery(i))
			break;
			int temp=Inf;
			for(j=0;j<mm;j++)
			if(vx[j])
			for(z=0;z<hh;z++)
			if(!vy[z]&&temp>lx[j]+ly[z]-mp[j][z])
			temp=lx[j]+ly[z]-mp[j][z];
			for(j=0;j<mm;j++)
			if(vx[j])
			lx[j]-=temp;
			for(j=0;j<hh;j++)
			if(vy[j])
			ly[j]+=temp; 
		}
	}
}
int main()
{
	int i,j,sum;
	char Map[M][M];
	while(~scanf("%d%d",&n,&m),n+m)
	{
		for(i=0;i<n;i++)
		scanf("%s",Map[i]);
		hh=mm=0;
		for(i=0;i<n;i++)
		for(j=0;j<m;j++)
		if(Map[i][j]=='m')
		MM[mm].x=i,MM[mm++].y=j;
		else if(Map[i][j]=='H')
		HH[hh].x=i,HH[hh++].y=j;
		for(i=0;i<mm;i++)
		for(j=0;j<hh;j++)
		mp[i][j]=-(abs(MM[i].x-HH[j].x)+abs(MM[i].y-HH[j].y));
		KM();
		sum=0;
		for(i=0;i<hh;i++)
		if(match[i]!=-1)
		sum+=mp[match[i]][i];
		printf("%d\n",-sum);
	}
	return 0;
}

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