private static Position[,] SimulateRound(Position[,] before, int numberWhenPeopleLeave, Func <Position[, ], int, int, int> numberOfAdjacents)
{
Position[,] after = before.Clone() as Position[, ];
for (int i = 0; i < before.GetLength(0); ++i)
{
for (int j = 0; j < before.GetLength(1); ++j)
{
if (before[i, j] == Position.Floor)
{
continue;
}
int adjacents = numberOfAdjacents(before, i, j);
if (adjacents >= numberWhenPeopleLeave)
{
after[i, j] = Position.Empty;
}
if (adjacents == 0)
{
after[i, j] = Position.Occupied;
}
}
}
return(after);
}
private static int CalculateResult1(Position[,] input, int numberWhenPeopleLeave, Func <Position[, ], int, int, int> numberOfAdjacents)
{
Position[,] before = input.Clone() as Position[, ];
Position[,] after = input.Clone() as Position[, ];
//Console.WriteLine("start");
//PrintPosition(before);
//Console.WriteLine();
do
{
before = after.Clone() as Position[, ];
after = SimulateRound(before, numberWhenPeopleLeave, numberOfAdjacents);
//Console.WriteLine("before");
//PrintPosition(before);
//Console.WriteLine("after");
//PrintPosition(after);
//Console.WriteLine();
} while (!PositionsEqual(before, after));
return(after.Cast <Position>().Count(p => p == Position.Occupied));
}
