aoc 1+2

www/statics/aoc/2018/07_solution-1.linq

@@ -0,0 +1,35 @@
+<Query Kind="Program" />
+
+class Node { public char N; public List<Node> Precond = new List<Node>(); public List<Node> Postcond = new List<Node>(); }
+
+void Main()
+{
+	var data = File
+		.ReadAllLines(Path.Combine(Path.GetDirectoryName(Util.CurrentQueryPath), @"07_input.txt"))
+		.Where(p => !string.IsNullOrWhiteSpace(p))
+		.Select(l => (l[5], l[36]))
+		.ToList();
+
+	var nodes = data.SelectMany(p => new[] {p.Item1, p.Item2}).Distinct().Select(p => new Node {N=p}).ToList();
+
+	foreach (var (pre, post) in data)
+	{
+		var n1 = nodes.First(p => p.N == pre);
+		var n2 = nodes.First(p => p.N == post);
+
+		n1.Postcond.Add(n2);
+		n2.Precond.Add(n1);
+	}
+	
+	var r = new StringBuilder();
+	for(var fin = new HashSet<Node>(); fin.Count<nodes.Count;)
+	{
+		var n = nodes.Where(p => !fin.Contains(p)).Where(p => p.Precond.All(q => fin.Contains(q))).OrderBy(p=>p.N).First();
+		fin.Add(n);
+		r.Append(n.N);
+	}
+	r.ToString().Dump();
+	
+}
+
+// Define other methods and classes here