private static long?RunDroid(long[] code, string[] instructions) { var input = new Queue <long>(); foreach (var line in instructions) { foreach (var ch in line) { input.Enqueue(ch); } input.Enqueue('\n'); } long?result = default; IntcodeMachine.RunProgram( program: code, ch => { if (ch < 255) { Console.Write((char)ch); } else { result = ch; } }, input ); return(result); }