public void should_count_wooden_areas_and_lumberyards_in_big_input()
{
var sut = new LumberArea(PuzzleInputParser.ParseStrings("Day18/Input.txt"));
sut.PassMinutes(10);
var forestCount = sut.CountAllWoodedAreas();
var lumberyardCount = sut.CountAllLumberyards();
forestCount.Should().Be(709);
lumberyardCount.Should().Be(502);
(forestCount * lumberyardCount).Should().Be(355918);
}
public void should_count_wooden_areas_and_lumberyards_in_example()
{
var sut = new LumberArea(new List <string>
{
".#.#...|#.",
".....#|##|",
".|..|...#.",
"..|#.....#",
"#.#|||#|#|",
"...#.||...",
".|....|...",
"||...#|.#|",
"|.||||..|.",
"...#.|..|."
});
_output.WriteLine("Initial State");
_output.WriteLine(sut.Print());
var minute = 0;
while (minute < 10)
{
sut.PassMinute();
minute++;
_output.WriteLine($"Minute {minute}");
_output.WriteLine(sut.Print());
}
//
var forestCount = sut.CountAllWoodedAreas();
var lumberyardCount = sut.CountAllLumberyards();
forestCount.Should().Be(37);
lumberyardCount.Should().Be(31);
(forestCount * lumberyardCount).Should().Be(1147);
}
public void should_observe_change_pattern_over_many_minutes()
{
var sut = new LumberArea(PuzzleInputParser.ParseStrings("Day18/Input.txt"));
var minute = 0;
var forestCount = sut.CountAllWoodedAreas();
var lumberyardCount = sut.CountAllLumberyards();
while (minute < 1000)
{
sut.PassMinute();
minute++;
forestCount = sut.CountAllWoodedAreas();
lumberyardCount = sut.CountAllLumberyards();
_output.WriteLine($"Minute {minute} - {forestCount}");
_output.WriteLine($"Minute {minute} - {lumberyardCount}");
}
// At minute 506, this starts to repeat for the forest counts
// Minute 506 - 586
// Minute 507 - 580
// Minute 508 - 573
// Minute 509 - 572
// Minute 510 - 568
// Minute 511 - 568
// Minute 512 - 567
// Minute 513 - 570
// Minute 514 - 570
// Minute 515 - 573
// Minute 516 - 572
// Minute 517 - 575
// Minute 518 - 573
// Minute 519 - 576
// Minute 520 - 576
// Minute 521 - 581
// Minute 522 - 586
// Minute 523 - 591
// Minute 524 - 593
// Minute 525 - 600
// Minute 526 - 602
// Minute 527 - 603
// Minute 528 - 606
// Minute 529 - 609
// Minute 530 - 606
// Minute 531 - 606
// Minute 532 - 601
// Minute 533 - 596
// and this for the lumber counts
// Minute 506 - 358
// Minute 507 - 358
// Minute 508 - 351
// Minute 509 - 344
// Minute 510 - 339
// Minute 511 - 337
// Minute 512 - 332
// Minute 513 - 331
// Minute 514 - 329
// Minute 515 - 331
// Minute 516 - 332
// Minute 517 - 335
// Minute 518 - 337
// Minute 519 - 336
// Minute 520 - 338
// Minute 521 - 337
// Minute 522 - 338
// Minute 523 - 339
// Minute 524 - 342
// Minute 525 - 341
// Minute 526 - 346
// Minute 527 - 350
// Minute 528 - 354
// Minute 529 - 353
// Minute 530 - 354
// Minute 531 - 355
// Minute 532 - 357
// Minute 533 - 360
var forestPatternStartingAt506 = new int[]
{
586,
580,
573,
572,
568,
568,
567,
570,
570,
573,
572,
575,
573,
576,
576,
581,
586,
591,
593,
600,
602,
603,
606,
609,
606,
606,
601,
596,
};
var lumberyardPatternStartingAt506 = new int[]
{
358,
358,
351,
344,
339,
337,
332,
331,
329,
331,
332,
335,
337,
336,
338,
337,
338,
339,
342,
341,
346,
350,
354,
353,
354,
355,
357,
360
};
// Figure out formula, verify it works
forestPatternStartingAt506[(1000 - 506) % forestPatternStartingAt506.Length]
.Should()
.Be(forestCount);
lumberyardPatternStartingAt506[(1000 - 506) % lumberyardPatternStartingAt506.Length]
.Should()
.Be(lumberyardCount);
}