#include using namespace std; //* ATCODER #include using namespace atcoder; typedef modint998244353 mint; //*/ /* BOOST MULTIPRECISION #include using namespace boost::multiprecision; //*/ typedef long long ll; #define rep(i, s, n) for (int i = (int)(s); i < (int)(n); i++) #define rrep(i, s, n) for (int i = (int)(n)-1; i >= (int)(s); i--) template bool chmin(T &a, const T &b) { if (a <= b) return false; a = b; return true; } template bool chmax(T &a, const T &b) { if (a >= b) return false; a = b; return true; } template T max(vector &a){ assert(!a.empty()); T ret = a[0]; for (int i=0; i<(int)a.size(); i++) chmax(ret, a[i]); return ret; } template T min(vector &a){ assert(!a.empty()); T ret = a[0]; for (int i=0; i<(int)a.size(); i++) chmin(ret, a[i]); return ret; } template T sum(vector &a){ T ret = 0; for (int i=0; i<(int)a.size(); i++) ret += a[i]; return ret; } int main(){ int k, n, m; cin >> k >> n >> m; vector a(k); rep(i,0,k){ cin >> a[i]; a[i]--; } vector b(n); rep(i,0,n){ cin >> b[i]; } mcf_graph mcf(n + 2); rep(i,0,m){ int u, v; cin >> u >> v; u--; v--; ll d; cin >> d; mcf.add_edge(u, v, k, d); mcf.add_edge(v, u, k, d); } rep(i,0,k){ mcf.add_edge(n, a[i], 1, 0); } rep(i,0,n){ mcf.add_edge(i, n+1, b[i], 0); } auto [x, y] = mcf.flow(n, n+1); cout << y << '\n'; }