int main()
{
freopen("a", "r", stdin);
int t, n, m;
cin >> t;
while (t--)
{
cin >> n >> m;
sap.init(2 * n + 2);
int source = 2 * n, sink = 2 * n + 1;
int tmp;
for (int i = 0; i < n; i++)
{
cin >> tmp;
sap.addCap(n + i, sink, tmp);
}
for (int i = 0; i < n; i++)
{
cin >> tmp;
sap.addCap(source, i, tmp);
}
int a, b;
for (int i = 0; i < m; i++)
{
cin >> a >> b;
a--; b--;
sap.cap[a][n + b] = inf;
}
cout << sap.solve(source, sink) << endl;
sap.output(source, sink);
if (t > 0) cout << endl;
}
return 0;
}
int main()
{
freopen("a", "r", stdin);
while (scanf("%d%d", &N, &M) != EOF)
{
int source = 0, sink = N - 1;
sap.init(N);
for (int i = 1; i <= M; i++)
{
int u, v, w;
scanf("%d%d%d", &u, &v, &w);
sap.addCap(u, v, w);
}
int tmp = sap.solve(source, sink);
sap.dfs1(source);
sap.dfs2(sink);
sap.output();
}
return 0;
}