public void ToStringTest(string input, string _)
{
var layout = new SeatLayout(input);
var result = layout.ToString();
Assert.Equal(input, result);
}
public override string Part1(string input)
{
var layout = new SeatLayout(input);
var seen = new HashSet <string>();
var status = layout.ToString();
while (seen.Add(status))
{
status = layout.Process();
}
return(layout.OccupiedCount().ToString());
}