DataGrids

var boxes = File.ReadAllLines(Path.Combine(Path.GetDirectoryName (Util.CurrentQueryPath),"..","day2.txt")).Where(b => !string.IsNullOrWhiteSpace(b)).Select (b => b.Split('x').Select(l => int.Parse(l)).ToArray()); // part 1 var paper = boxes.Select(b => { var surfaces = new [] { b[0] * b[1], b[1] * b[2], b[2] * b[0] }; return surfaces.Sum (s => 2 * s) + surfaces.Min ( ); }).Sum(); paper.Dump(); // part 2 var ribbon = boxes.Select (b => { var perimeter = (new [] { b[0] + b[1], b[1] + b[2], b[2] + b[0] }).Min() * 2; var bow = b[0] * b[1] * b[2]; return perimeter + bow; }).Sum(); ribbon.Dump();