#include <fstream>
#include <vector>
#include <cstring>
using namespace std;
ifstream fin("cuplaj.in");
ofstream fout("cuplaj.out");
#define dim 100005
vector <int> v[dim];
int viz[dim], level[dim],r[dim],n ,m, e,nrt;

void read()
{
	int x, y, i;
	fin>>n >>m >>e;
	for(i=1;i<=e;++i)
	{
		fin>>x >>y;
		v[x].push_back(y);
	}
}

int pairup(int nod)
{
	if(viz[nod]==1)
		return 0;
	viz[nod]=1;
	
	for(int k=0;k<(int)v[nod].size();++k)
		if(r[v[nod][k]]==0)
		{
			level[nod]=v[nod][k];
			r[v[nod][k]]=nod;
			return 1;
		}
	
	for(int k=0;k<(int)v[nod].size();++k)
		if(pairup(v[nod][k]))
		{
			level[nod]=v[nod][k];
			r[v[nod][k]]=nod;
			return 1;
		}
		
	return 0;
}

void solve()
{
	int i, ok=1;
	
	while(ok!=0)
	{
		ok=0;
		memset(viz,0,sizeof(viz));
		for(i=1;i<=n;++i)
			if(!level[i] && pairup(i))
			{
				ok=1;
				++nrt;
			}
	}
}

int main()
{
	read();
	solve();
	fout<<nrt;
	return 0;
}