protected override String DoSolve(String[] input)
{
int ribbonRequired = 0;
foreach (String line in input)
{
string[] dimensions = line.Split('x');
if (dimensions.Length == 3)
{
IPresent present = Factory.CreatePresent(Convert.ToInt32(dimensions[0].Trim()), Convert.ToInt32(dimensions[1].Trim()), Convert.ToInt32(dimensions[2].Trim()));
ribbonRequired = ribbonRequired + present.PerimeterSmallestSide() + present.Volume();
}
else
{
throw new Exception($"Present doesn't have 3 dimensions: { line }");
}
}
return($"The Elves should order { ribbonRequired } feet of ribbon.");
}