static void Main()
{
var h = Read();
int n = h[0], m = h[1];
var es = Array.ConvertAll(new bool[m], _ => Read());
var(c, inEdges) = ShortestPath0.Dijkstra(n + 1, es, false, 1, n);
if (inEdges[n] == null)
{
Console.WriteLine(-1); return;
}
var path = ShortestPath0.GetPathVertexes(inEdges, n);
Console.WriteLine(string.Join(" ", path));
}
static void Main()
{
var h = Read();
int n = h[0], m = h[1], s = h[2], t = h[3];
var es = Array.ConvertAll(new bool[m], _ => Read());
var(c, inEdges) = ShortestPath0.Dijkstra(n, es, true, s, t);
if (inEdges[t] == null)
{
Console.WriteLine(-1); return;
}
var path = ShortestPath0.GetPathEdges(inEdges, t);
Console.WriteLine($"{c[t]} {path.Length}");
Console.WriteLine(string.Join("\n", path.Select(e => $"{e[0]} {e[1]}")));
}