#include <cstdio> #include <vector> const int maxn = 1005; int n, m, t; int mch[maxn], vistime[maxn]; std::vector<int> e[maxn]; bool dfs(const int u, const int tag); int main() { scanf("%d %d %d", &n, &m, &t); for (int u, v; t; --t) { scanf("%d %d", &u, &v); e[u].push_back(v); } int ans = 0; for (int i = 1; i <= n; ++i) if (dfs(i, i)) { ++ans; } printf("%d\n", ans); } bool dfs(const int u, const int tag) { if (vistime[u] == tag) return false; vistime[u] = tag; for (auto v : e[u]) if ((mch[v] == 0) || dfs(mch[v], tag)) { mch[v] = u; return true; } return false; }