DataGrids

var strings = File.ReadAllLines(Path.Combine(Path.GetDirectoryName (Util.CurrentQueryPath),"..","day8.txt")); // part 1 var totalLength = strings.Sum(s => s.Length); var unescaped = strings.Select(s => s.Substring(1, s.Length-2)) .Select(s => Regex.Replace(s, "\\\\\\\\", @"\")) .Select(s => Regex.Replace(s, "\\\\\"", "\"")) .Select(s => Regex.Replace(s, "\\\\[x]([0-9a-f]{2})", "X")); var memLength = unescaped.Sum(s => s.Length); (totalLength - memLength).Dump(); // part 2 var escaped = strings.Select(u => Regex.Replace(u, "\\\\", "\\\\")) .Select(u => Regex.Replace(u, "\"","\\\"")); (escaped.Sum(s => s.Length + 2) - totalLength).Dump();