#include <vector>
#include <list>
#include <map>
#include <set>
#include <unordered_set>
#include <unordered_map>
#include <deque>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <queue>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cctype>
#include <string>
#include <cstring>
#include <ctime>
#include <fstream>
#include <cstdio>
#include <climits>
#include <complex>
#include <cstdint>
#include <tuple>

#define M_PI       3.14159265358979323846

using namespace std;

//conversion
//------------------------------------------
inline int toInt(string s) { int v; istringstream sin(s); sin >> v; return v; }
template<class T> inline string toString(T x) { ostringstream sout; sout << x; return sout.str(); }
inline int readInt() { int x; scanf("%d", &x); return x; }

//typedef
//------------------------------------------
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<string> VS;
typedef pair<int, int> PII;
typedef pair<int, PII> TIII;
typedef long long LL;
typedef unsigned long long ULL;
typedef vector<LL> VLL;
typedef vector<VLL> VVLL;

//container util

//------------------------------------------
#define ALL(a)  (a).begin(),(a).end()
#define RALL(a) (a).rbegin(), (a).rend()
#define PB push_back
#define MP make_pair
#define SZ(a) int((a).size())
#define SQ(a) ((a)*(a))
#define EACH(i,c) for(typeof((c).begin()) i=(c).begin(); i!=(c).end(); ++i)
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define SORT(c) sort((c).begin(),(c).end())

//repetition
//------------------------------------------
#define FOR(i,s,n) for(int i=s;i<(int)n;++i)
#define REP(i,n) FOR(i,0,n)
#define MOD 1000000007

#define rep(i, a, b) for(int i = a; i < (b); ++i)
#define trav(a, x) for(auto& a : x)
#define all(x) x.begin(), x.end()
#define sz(x) (int)(x).size()
struct Edge {
    int to, cost;
    Edge(int to, int cost): to(to), cost(cost) {}
};

typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<vector<Edge>> AdjList;
AdjList graph;

const int INF = 100000000;


// 1-indexed

bool cmp(const pii& a, const pii&b){
    if(a.first == b.first){
        return a.second < b.second;
    }

    return a.first < b.first;
}
struct edge{
    int to, cap, rev;
    edge(int a, int b, int c){
        to = a;
        cap = b;
        rev = c;
    }
};
vector<edge> G[510];
bool used[510];
int X, Y, n, m;

void add_edge(int from, int to, int cap){
    G[from].push_back({to, cap, (int)G[to].size()});
    G[to].push_back({from, 0, (int)G[from].size()-1});
}

int dfs(int v, int t , int f){
    if(v == t) return f;
    used[v] = true;
    for(int i=0; i<G[v].size(); ++i){
        edge &e = G[v][i];
        if(!used[e.to] && e.cap > 0){
            int d = dfs(e.to, t, min(f, e.cap));
            if(d > 0){
                e.cap -= d;
                G[e.to][e.rev].cap += d;
                return d;
            }
        }
    }
    return 0;
}
int max_flow(int s, int t){
    int flow = 0;
    for(;;) {
        memset(used, 0, sizeof(used));
        int f = dfs(s, t, INF);
        if (f == 0) return flow;
        flow += f;
    }
}
int main() {
    //cout << fixed << setprecision(15);
    cin >> X >> Y >> m;

    int s = X+Y, t = s+1;
    REP(i, X){
        add_edge(s, i, 1);
    }
    REP(i, Y){
        add_edge(X+i, t, 1);
    }

    for(int i=0; i<m; ++i){
        int u, v; cin >> u >> v;
        add_edge(u, X+v, 1);
    }
    cout << max_flow(s, t) << endl;
    return 0;
}


Measured memory_bytes: 3284