static void ApplyRuleSet2(SeatLayout previousLayout, SeatLayout currentLayout)
{
for (int row = 0; row < currentLayout.RowCount; row++)
{
for (int col = 0; col < currentLayout.ColumnCount; col++)
{
if (previousLayout.IsFloor(row, col))
{
continue;
}
else
{
bool occupied = previousLayout.IsOccupied(row, col);
int withinView = previousLayout.CountWithinViewOccupied(row, col);
// If a seat is empty (L) and there are no visible
// occupied seats within view, the seat becomes occupied.
// The person can only see the first seat encountered in
// each direction.
if (!occupied && withinView == 0)
{
currentLayout.MarkOccupied(row, col);
}
// If a seat is occupied (#) and five or more seats
// within view are also occupied, the seat becomes empty.
// The person can only see the first seat encountered in
// each direction.
else if (occupied && withinView >= 5)
{
currentLayout.MarkEmpty(row, col);
}
}
}
}
}
static int GetStabilizedOccupiedCount(
SeatLayout layout,
Action <SeatLayout, SeatLayout> ApplyRules)
{
SeatLayout currentLayout = (SeatLayout)layout.Clone();
// Console.WriteLine("Initial:");
// Console.WriteLine("-----------------------------");
// Console.WriteLine(currentLayout);
// Console.WriteLine();
// int iterations = 1;
do
{
// Console.WriteLine($"Iteration: {++iterations}");
SeatLayout lastLayout = currentLayout;
currentLayout = (SeatLayout)currentLayout.Clone();
ApplyRules(lastLayout, currentLayout);
// Console.WriteLine("-----------------------------");
// Console.WriteLine(currentLayout);
// Console.WriteLine();
} while (currentLayout.IsDirty);
return(currentLayout.OccupiedSeatCount);
}
static void ApplyRuleSet1(SeatLayout previousLayout, SeatLayout currentLayout)
{
for (int row = 0; row < currentLayout.RowCount; row++)
{
for (int col = 0; col < currentLayout.ColumnCount; col++)
{
if (previousLayout.IsFloor(row, col))
{
continue;
}
else
{
bool occupied = previousLayout.IsOccupied(row, col);
int adjacent = previousLayout.CountAdjacentOccupied(row, col);
// If a seat is empty (L) and there are no occupied
// seats adjacent to it, the seat becomes occupied.
if (!occupied && adjacent == 0)
{
currentLayout.MarkOccupied(row, col);
}
// If a seat is occupied (#) and four or more seats
// adjacent to it are also occupied, the seat becomes empty.
else if (occupied && adjacent >= 4)
{
currentLayout.MarkEmpty(row, col);
}
}
}
}
}
static void Main(string[] args)
{
var lines = File.ReadLines("input.txt");
var layout = new SeatLayout(lines);
Stopwatch watch = new();
watch.Start();
int stabilizedCount1 = GetStabilizedOccupiedCount(layout, ApplyRuleSet1);
watch.Stop();
Console.WriteLine($"Rule set 1 stabilized Count: {stabilizedCount1} - Elapsed: {watch.Elapsed}");
watch.Reset();
watch.Start();
int stabilizedCount2 = GetStabilizedOccupiedCount(layout, ApplyRuleSet2);
watch.Stop();
Console.WriteLine($"Rule set 2 stabilized Count: {stabilizedCount2} - Elapsed: {watch.Elapsed}");
}
