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));
}
private static bool PositionsEqual(Position[,] p1, Position[,] p2) => Enumerable.SequenceEqual(p1.Cast <Position>(), p2.Cast <Position>());
