static void Process4dCycles(string[] _input_grid, _4d_cube_container _container, int _cycles)
{
_container.SetBoundaries(0, 0, 0, 0, _input_grid.Length - 1, _input_grid[0].Length - 1, 0, 0);
for (var x = 0; x < _input_grid.Length; x++)
{
for (var y = 0; y < _input_grid[x].Length; y++)
{
_container[x, y, 0, 0] = new cube(_input_grid[x][y] == '#' ? true : false);
}
}
for (var cycle = 0; cycle < _cycles; cycle++)
{
// add a 4d layer around the existing hypercubes
_container.Expand();
// transform the cubes according to these rules:
// 1. if a cube is active and exactly 2 or 3 of its neighbors are also active, the cube remains active. Otherwise, the cube becomes inactive.
//
// 2. if a cube is inactive but exactly 3 of its neighbors are active, the cube becomes active. Otherwise, the cube remains inactive.
for (var x = _container.min_x; x <= _container.max_x; x++)
{
for (var y = _container.min_y; y <= _container.max_y; y++)
{
for (var z = _container.min_z; z <= _container.max_z; z++)
{
for (var w = _container.min_w; w <= _container.max_w; w++)
{
if (_container[x, y, z, w].state == true)
{
if (_container[x, y, z, w].active_neighbors != 2 && _container[x, y, z, w].active_neighbors != 3)
{
_container[x, y, z, w].Transform(false);
}
}
else if (_container[x, y, z, w].active_neighbors == 3)
{
_container[x, y, z, w].Transform(true);
}
}
}
}
}
// apply transforms to each cube
_container.Update();
}
}
static async Task Main(string[] args)
{
var input_grid = await File.ReadAllLinesAsync("input.txt", Encoding.UTF8);
var _3d_container = new _3d_cube_container();
Process3dCycles(input_grid, _3d_container, 6);
Console.WriteLine(_3d_container.active_cube_count);
var _4d_container = new _4d_cube_container();
Process4dCycles(input_grid, _4d_container, 6);
Console.WriteLine(_4d_container.active_cube_count);
}
