HDU4619+匈牙利

/*
匈牙利算法
二分匹配 最小点覆盖=最大匹配。
即踢掉最小点覆盖
*/
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<algorithm>
#include<iostream>
#include<queue>
#include<map>
#include<math.h>
using namespace std;
typedef long long ll;
//typedef __int64 int64;
const int maxn = 1015;
const int inf = 0x7fffffff;
const double pi=acos(-1.0);
const double eps = 1e-8;
struct Edge{
	int v,next;
}edge[ maxn<<4 ];
struct Node{
	int x,y;
}sum[ maxn<<1 ];
int cnt,head[ maxn<<1 ];
int vis[ maxn<<1 ],mylink[ maxn<<1 ];
void init(){
	cnt = 0;
	memset( head,-1,sizeof( head ) );
}
void addedge( int a,int b ){
	edge[ cnt ].v = b;
	edge[ cnt ].next = head[ a ];
	head[ a ] = cnt++;
}
bool km( int u ){
	for( int i=head[ u ];i!=-1;i=edge[ i ].next ){
		int v = edge[ i ].v;
		if( vis[ v ]==0 ){
			vis[ v ] = 1;
			if( mylink[ v ]==-1||km( mylink[v] ) ){
				mylink[ v ] = u;
				return true;
			}
		}
	}
	return false;
}
int solve( int n,int m ){
	memset( mylink,-1,sizeof( mylink ) );
	int ans = 0;
	for( int i=1;i<=n;i++ ){
		memset( vis,0,sizeof( vis ) );
		if( km(i) )
			ans++;
	}
	return ans;
}
bool Judge( int i,int j ){
	int x1 = sum[i].x;
	int y1 = sum[i].y;
	int x2 = sum[j].x;
	int y2 = sum[j].y;
	if( x1==x2 ){
		if( y1==y2 ) return true;
		if( y1==y2+1 ) return true;
	}
	if( x1+1==x2 ){
		if( y1==y2 ) return true;
		if( y1==y2+1 ) return true;
	}
	return false;
}	
 
int main(){
	int n,m;
	while( scanf("%d%d",&n,&m)==2,n+m ){
		init();
		int cc = 1;
		for( int i=1;i<=n;i++ )
			scanf("%d%d",&sum[cc].x,&sum[cc].y),cc++;
		for( int j=1;j<=m;j++ )
			scanf("%d%d",&sum[cc].x,&sum[cc].y),cc++;
		for( int i=1;i<=n;i++ ){
			for( int j=n+1;j<cc;j++ ){
				if( Judge( i,j ) ){
					addedge( i,j );
				}
			}
		}
		printf("%d\n",cc-1-solve( n,m ));
	}
	return 0;
}