public decimal Grow2(
string input,
string inputPatterns)
{
var patterns = inputPatterns.Split(new string[] { Environment.NewLine }, StringSplitOptions.None)
.Select(p => p.Split(new string[] { " => " }, StringSplitOptions.None))
.Select(p => new Pattern(p[0], p[1].ToCharArray()[0]))
.ToArray();
var iteration = new PlantIteration(input, 1, 0);
var lastValue = 0;
var lastDifference = 0;
for (var i = 1; i <= 200; i++)
{
var newState = iteration.GetNewState(patterns);
iteration = new PlantIteration(newState, i + 1, iteration.ZeroIndex);
var newValue = CalculateSum(iteration);
lastDifference = newValue - lastValue;
Console.WriteLine($"Iteration: {i} - Sum: {newValue}, Difference: {lastDifference}");
lastValue = newValue;
}
var value = ((50000000000M - 200) * lastDifference) + lastValue;
return(value);
}
private static int CalculateSum(
PlantIteration iteration)
{
var value = 0;
for (var i = 0; i < iteration.CurrentState.Length; i++)
{
if (iteration.CurrentState[i] == '#')
{
value += i - iteration.ZeroIndex;
}
}
return(value);
}
public int Grow1(
string input,
string inputPatterns)
{
var patterns = inputPatterns.Split(new string[] { Environment.NewLine }, StringSplitOptions.None)
.Select(p => p.Split(new string[] { " => " }, StringSplitOptions.None))
.Select(p => new Pattern(p[0], p[1].ToCharArray()[0]))
.ToArray();
var iteration = new PlantIteration(input, 1, 0);
for (var i = 1; i <= 20; i++)
{
var newState = iteration.GetNewState(patterns);
iteration = new PlantIteration(newState, i + 1, iteration.ZeroIndex);
}
var value = CalculateSum(iteration);
return(value);
}