public override string Solve() { var input = ParserFactory.CreateMultiLineIntParser() .GetData() .ToArray(); for (var x = 0; x < input.Length - 1; x++) { for (var y = x + 1; y < input.Length; y++) { if (input[x] + input[y] == 2020) { return((input[x] * input[y]).ToString()); } } } return("No Match"); }