为什么我这样写还是错的！

	int n,a[10001],b[10001],g[10001],k[10001],x,y,da=0;
	cin >> n;
	for (int i=1;i<=n;i++)
		cin >> a[i]>> b[i]>> g[i]>> k[i];
	cin >> x>> y;
	for (int i=1;i<=n;i++)
		if (x>=a[i]&&x<=a[i]+g[i]&&y>=b[i]&&y<=b[i]+k[i]) da++;
	if (da==0) cout << -1;
	else cout << da;
	return 0;