public void Part_1_example_mutations()
{
var grid = Parse(Example);
var rules = new Part1Rules(grid);
Assert.True(rules.Apply());
Assert.Equal(@"#.##.##.##
#######.##
#.#.#..#..
####.##.##
#.##.##.##
#.#####.##
..#.#.....
##########
#.######.#
#.#####.##", grid.ToString());
Assert.True(rules.Apply());
Assert.Equal(@"#.LL.L#.##
#LLLLLL.L#
L.L.L..L..
#LLL.LL.L#
#.LL.LL.LL
#.LLLL#.##
..L.L.....
#LLLLLLLL#
#.LLLLLL.L
#.#LLLL.##", grid.ToString());
}
private static int Part1(ReadOnlyMemory <string> input)
{
var grid = Parse(input);
var rules = new Part1Rules(grid);
while (rules.Apply())
{
}
return(grid.Seats().Count(seat => seat.Occupied));
}