feat: Add day 9 (without definitiv solution for part 2)
This commit is contained in:
Roman Spring
parent
96f50957a4
commit
ab2bf7f386
3 changed files with 623 additions and 0 deletions
8
AdventOfCode2025/Inputs/Day9_0.txt
Normal file
8
AdventOfCode2025/Inputs/Day9_0.txt
Normal file
|
|
@ -0,0 +1,8 @@
|
|||
7,1
|
||||
11,1
|
||||
11,7
|
||||
9,7
|
||||
9,5
|
||||
2,5
|
||||
2,3
|
||||
7,3
|
||||
496
AdventOfCode2025/Inputs/Day9_1.txt
Normal file
496
AdventOfCode2025/Inputs/Day9_1.txt
Normal file
|
|
@ -0,0 +1,496 @@
|
|||
97989,50290
|
||||
97989,51491
|
||||
97502,51491
|
||||
97502,52723
|
||||
97969,52723
|
||||
97969,53929
|
||||
97784,53929
|
||||
97784,55111
|
||||
97415,55111
|
||||
97415,56355
|
||||
97603,56355
|
||||
97603,57620
|
||||
97806,57620
|
||||
97806,58795
|
||||
97420,58795
|
||||
97420,60036
|
||||
97381,60036
|
||||
97381,61082
|
||||
96479,61082
|
||||
96479,62403
|
||||
96738,62403
|
||||
96738,63461
|
||||
95990,63461
|
||||
95990,64680
|
||||
95819,64680
|
||||
95819,65812
|
||||
95362,65812
|
||||
95362,67051
|
||||
95198,67051
|
||||
95198,68160
|
||||
94676,68160
|
||||
94676,69290
|
||||
94212,69290
|
||||
94212,70413
|
||||
93728,70413
|
||||
93728,71204
|
||||
92575,71204
|
||||
92575,72650
|
||||
92730,72650
|
||||
92730,73331
|
||||
91442,73331
|
||||
91442,74529
|
||||
91099,74529
|
||||
91099,75554
|
||||
90450,75554
|
||||
90450,76726
|
||||
90023,76726
|
||||
90023,77816
|
||||
89454,77816
|
||||
89454,78682
|
||||
88568,78682
|
||||
88568,79549
|
||||
87701,79549
|
||||
87701,80687
|
||||
87173,80687
|
||||
87173,81723
|
||||
86503,81723
|
||||
86503,82480
|
||||
85516,82480
|
||||
85516,83576
|
||||
84896,83576
|
||||
84896,84275
|
||||
83863,84275
|
||||
83863,85339
|
||||
83187,85339
|
||||
83187,85797
|
||||
81950,85797
|
||||
81950,86483
|
||||
80938,86483
|
||||
80938,87077
|
||||
79861,87077
|
||||
79861,88209
|
||||
79208,88209
|
||||
79208,89104
|
||||
78352,89104
|
||||
78352,89637
|
||||
77234,89637
|
||||
77234,90451
|
||||
76310,90451
|
||||
76310,90829
|
||||
75107,90829
|
||||
75107,91245
|
||||
73945,91245
|
||||
73945,91916
|
||||
72934,91916
|
||||
72934,92396
|
||||
71820,92396
|
||||
71820,93211
|
||||
70872,93211
|
||||
70872,94077
|
||||
69930,94077
|
||||
69930,94527
|
||||
68790,94527
|
||||
68790,94258
|
||||
67369,94258
|
||||
67369,95368
|
||||
66491,95368
|
||||
66491,95479
|
||||
65238,95479
|
||||
65238,96120
|
||||
64164,96120
|
||||
64164,95840
|
||||
62817,95840
|
||||
62817,96910
|
||||
61843,96910
|
||||
61843,96748
|
||||
60550,96748
|
||||
60550,96930
|
||||
59348,96930
|
||||
59348,97072
|
||||
58143,97072
|
||||
58143,97949
|
||||
57048,97949
|
||||
57048,97240
|
||||
55726,97240
|
||||
55726,98112
|
||||
54598,98112
|
||||
54598,98237
|
||||
53380,98237
|
||||
53380,97914
|
||||
52139,97914
|
||||
52139,97992
|
||||
50925,97992
|
||||
50925,98410
|
||||
49707,98410
|
||||
49707,97863
|
||||
48497,97863
|
||||
48497,97485
|
||||
47303,97485
|
||||
47303,98306
|
||||
46027,98306
|
||||
46027,97967
|
||||
44828,97967
|
||||
44828,97098
|
||||
43711,97098
|
||||
43711,97154
|
||||
42483,97154
|
||||
42483,97339
|
||||
41219,97339
|
||||
41219,96502
|
||||
40149,96502
|
||||
40149,96571
|
||||
38895,96571
|
||||
38895,96615
|
||||
37628,96615
|
||||
37628,95738
|
||||
36612,95738
|
||||
36612,95467
|
||||
35431,95467
|
||||
35431,95568
|
||||
34115,95568
|
||||
34115,94799
|
||||
33098,94799
|
||||
33098,94374
|
||||
31962,94374
|
||||
31962,93971
|
||||
30814,93971
|
||||
30814,93488
|
||||
29698,93488
|
||||
29698,92987
|
||||
28589,92987
|
||||
28589,92387
|
||||
27531,92387
|
||||
27531,91964
|
||||
26374,91964
|
||||
26374,91195
|
||||
25412,91195
|
||||
25412,90587
|
||||
24359,90587
|
||||
24359,90142
|
||||
23193,90142
|
||||
23193,88876
|
||||
22590,88876
|
||||
22590,88559
|
||||
21324,88559
|
||||
21324,87802
|
||||
20371,87802
|
||||
20371,86713
|
||||
19692,86713
|
||||
19692,86217
|
||||
18525,86217
|
||||
18525,85067
|
||||
17930,85067
|
||||
17930,84389
|
||||
16911,84389
|
||||
16911,83742
|
||||
15846,83742
|
||||
15846,82958
|
||||
14904,82958
|
||||
14904,81974
|
||||
14175,81974
|
||||
14175,81240
|
||||
13160,81240
|
||||
13160,80274
|
||||
12409,80274
|
||||
12409,79076
|
||||
11962,79076
|
||||
11962,78077
|
||||
11274,78077
|
||||
11274,77102
|
||||
10554,77102
|
||||
10554,76169
|
||||
9765,76169
|
||||
9765,75200
|
||||
9019,75200
|
||||
9019,74195
|
||||
8323,74195
|
||||
8323,72908
|
||||
8132,72908
|
||||
8132,72167
|
||||
6929,72167
|
||||
6929,70969
|
||||
6588,70969
|
||||
6588,69949
|
||||
5879,69949
|
||||
5879,68497
|
||||
6165,68497
|
||||
6165,67407
|
||||
5643,67407
|
||||
5643,66510
|
||||
4579,66510
|
||||
4579,65176
|
||||
4704,65176
|
||||
4704,64177
|
||||
3836,64177
|
||||
3836,62896
|
||||
3875,62896
|
||||
3875,61817
|
||||
3194,61817
|
||||
3194,60482
|
||||
3554,60482
|
||||
3554,59411
|
||||
2752,59411
|
||||
2752,58208
|
||||
2547,58208
|
||||
2547,56980
|
||||
2517,56980
|
||||
2517,55823
|
||||
1958,55823
|
||||
1958,54524
|
||||
2667,54524
|
||||
2667,53339
|
||||
2335,53339
|
||||
2335,52126
|
||||
2375,52126
|
||||
2375,50925
|
||||
2009,50925
|
||||
2009,50270
|
||||
94671,50270
|
||||
94671,48487
|
||||
1828,48487
|
||||
1828,47303
|
||||
2513,47303
|
||||
2513,46074
|
||||
2271,46074
|
||||
2271,44890
|
||||
2603,44890
|
||||
2603,43602
|
||||
2079,43602
|
||||
2079,42477
|
||||
2804,42477
|
||||
2804,41220
|
||||
2668,41220
|
||||
2668,40118
|
||||
3347,40118
|
||||
3347,38850
|
||||
3239,38850
|
||||
3239,37808
|
||||
4061,37808
|
||||
4061,36600
|
||||
4219,36600
|
||||
4219,35259
|
||||
3995,35259
|
||||
3995,34127
|
||||
4466,34127
|
||||
4466,33015
|
||||
4977,33015
|
||||
4977,32062
|
||||
5871,32062
|
||||
5871,30606
|
||||
5552,30606
|
||||
5552,29497
|
||||
6079,29497
|
||||
6079,28474
|
||||
6780,28474
|
||||
6780,27581
|
||||
7708,27581
|
||||
7708,26356
|
||||
8004,26356
|
||||
8004,25160
|
||||
8381,25160
|
||||
8381,24143
|
||||
9070,24143
|
||||
9070,23088
|
||||
9700,23088
|
||||
9700,22283
|
||||
10688,22283
|
||||
10688,21165
|
||||
11226,21165
|
||||
11226,20507
|
||||
12371,20507
|
||||
12371,19452
|
||||
12995,19452
|
||||
12995,18580
|
||||
13845,18580
|
||||
13845,17660
|
||||
14637,17660
|
||||
14637,16652
|
||||
15341,16652
|
||||
15341,16010
|
||||
16419,16010
|
||||
16419,15192
|
||||
17311,15192
|
||||
17311,14185
|
||||
18034,14185
|
||||
18034,13675
|
||||
19196,13675
|
||||
19196,12791
|
||||
20033,12791
|
||||
20033,12200
|
||||
21105,12200
|
||||
21105,10904
|
||||
21654,10904
|
||||
21654,10593
|
||||
22924,10593
|
||||
22924,9648
|
||||
23754,9648
|
||||
23754,9111
|
||||
24855,9111
|
||||
24855,8201
|
||||
25734,8201
|
||||
25734,7917
|
||||
26974,7917
|
||||
26974,7749
|
||||
28254,7749
|
||||
28254,6483
|
||||
28979,6483
|
||||
28979,5864
|
||||
30043,5864
|
||||
30043,5557
|
||||
31245,5557
|
||||
31245,5054
|
||||
32361,5054
|
||||
32361,5264
|
||||
33738,5264
|
||||
33738,4569
|
||||
34777,4569
|
||||
34777,4441
|
||||
36008,4441
|
||||
36008,3722
|
||||
37060,3722
|
||||
37060,3583
|
||||
38281,3583
|
||||
38281,3084
|
||||
39411,3084
|
||||
39411,2546
|
||||
40546,2546
|
||||
40546,2210
|
||||
41732,2210
|
||||
41732,2116
|
||||
42960,2116
|
||||
42960,2271
|
||||
44214,2271
|
||||
44214,2396
|
||||
45450,2396
|
||||
45450,2291
|
||||
46657,2291
|
||||
46657,2476
|
||||
47878,2476
|
||||
47878,1871
|
||||
49071,1871
|
||||
49071,2077
|
||||
50289,2077
|
||||
50289,2199
|
||||
51500,2199
|
||||
51500,1876
|
||||
52732,1876
|
||||
52732,2410
|
||||
53913,2410
|
||||
53913,2140
|
||||
55159,2140
|
||||
55159,2707
|
||||
56314,2707
|
||||
56314,2740
|
||||
57532,2740
|
||||
57532,3112
|
||||
58696,3112
|
||||
58696,3343
|
||||
59882,3343
|
||||
59882,2828
|
||||
61247,2828
|
||||
61247,3779
|
||||
62266,3779
|
||||
62266,3854
|
||||
63506,3854
|
||||
63506,4047
|
||||
64723,4047
|
||||
64723,4846
|
||||
65739,4846
|
||||
65739,5010
|
||||
66972,5010
|
||||
66972,5441
|
||||
68112,5441
|
||||
68112,5931
|
||||
69227,5931
|
||||
69227,6172
|
||||
70459,6172
|
||||
70459,6919
|
||||
71456,6919
|
||||
71456,7579
|
||||
72486,7579
|
||||
72486,7942
|
||||
73678,7942
|
||||
73678,8504
|
||||
74766,8504
|
||||
74766,9270
|
||||
75730,9270
|
||||
75730,9968
|
||||
76731,9968
|
||||
76731,10498
|
||||
77850,10498
|
||||
77850,11140
|
||||
78898,11140
|
||||
78898,12581
|
||||
79328,12581
|
||||
79328,12708
|
||||
80784,12708
|
||||
80784,13781
|
||||
81475,13781
|
||||
81475,14230
|
||||
82711,14230
|
||||
82711,15695
|
||||
83006,15695
|
||||
83006,15935
|
||||
84479,15935
|
||||
84479,17023
|
||||
85114,17023
|
||||
85114,18332
|
||||
85480,18332
|
||||
85480,18794
|
||||
86798,18794
|
||||
86798,19621
|
||||
87719,19621
|
||||
87719,20964
|
||||
87983,20964
|
||||
87983,21736
|
||||
88981,21736
|
||||
88981,22800
|
||||
89587,22800
|
||||
89587,23867
|
||||
90178,23867
|
||||
90178,24657
|
||||
91212,24657
|
||||
91212,26069
|
||||
91221,26069
|
||||
91221,26769
|
||||
92456,26769
|
||||
92456,28143
|
||||
92466,28143
|
||||
92466,29304
|
||||
92844,29304
|
||||
92844,30131
|
||||
93940,30131
|
||||
93940,31209
|
||||
94528,31209
|
||||
94528,32510
|
||||
94564,32510
|
||||
94564,33582
|
||||
95164,33582
|
||||
95164,34788
|
||||
95398,34788
|
||||
95398,36002
|
||||
95576,36002
|
||||
95576,37113
|
||||
96087,37113
|
||||
96087,38310
|
||||
96298,38310
|
||||
96298,39518
|
||||
96444,39518
|
||||
96444,40649
|
||||
96940,40649
|
||||
96940,41756
|
||||
97650,41756
|
||||
97650,42969
|
||||
97823,42969
|
||||
97823,44226
|
||||
97631,44226
|
||||
97631,45435
|
||||
97757,45435
|
||||
97757,46669
|
||||
97524,46669
|
||||
97524,47877
|
||||
97545,47877
|
||||
97545,49067
|
||||
98367,49067
|
||||
98367,50290
|
||||
119
AdventOfCode2025/Solutions/Day9.cs
Normal file
119
AdventOfCode2025/Solutions/Day9.cs
Normal file
|
|
@ -0,0 +1,119 @@
|
|||
using Position = (long X, long Y);
|
||||
|
||||
namespace AdventOfCode2025.Solutions;
|
||||
|
||||
public class Day9() : Solution(9)
|
||||
{
|
||||
private const char SplitChar = ',';
|
||||
|
||||
public override string SolvePart1() =>
|
||||
GetPositionCombinations(GetPositions().ToList())
|
||||
.Select(combination => CalculateRectangleArea(combination.Pos1, combination.Pos2))
|
||||
.Max()
|
||||
.ToString();
|
||||
|
||||
public override string SolvePart2()
|
||||
{
|
||||
List<Position> positions = GetPositions().ToList();
|
||||
|
||||
// var areas =
|
||||
// GetPositionCombinations(positions)
|
||||
// .Select(GetRectangleCorners)
|
||||
// .Where(corners => corners.All(pos => IsPointInsidePolygon(pos, positions)))
|
||||
// .Select(corners => CalculateRectangleArea(corners[0], corners[2]))
|
||||
// .Max();
|
||||
var areas =
|
||||
GetPositionCombinations(positions)
|
||||
.AsParallel()
|
||||
.Where(combination => AreAllRectanglePointsInsidePolygon(combination.Pos1, combination.Pos2, positions))
|
||||
.Select(combination => CalculateRectangleArea(combination.Pos1, combination.Pos2))
|
||||
.Max();
|
||||
return areas.ToString();
|
||||
}
|
||||
|
||||
private static bool AreAllRectanglePointsInsidePolygon(Position pos1, Position pos2, List<Position> polygon)
|
||||
{
|
||||
var minX = Math.Min(pos1.X, pos2.X);
|
||||
var maxX = Math.Max(pos1.X, pos2.X);
|
||||
var minY = Math.Min(pos1.Y, pos2.Y);
|
||||
var maxY = Math.Max(pos1.Y, pos2.Y);
|
||||
|
||||
if (GetRectangleCorners(pos1, pos2).All(corner => IsPointInsidePolygon(corner, polygon)))
|
||||
{
|
||||
return false;
|
||||
}
|
||||
|
||||
for (var x = minX; x <= maxX; x++)
|
||||
{
|
||||
for (var y = minY; y <= maxY; y++)
|
||||
{
|
||||
if (!IsPointInsidePolygon((x, y), polygon))
|
||||
{
|
||||
return false;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
// ray-casting algorithm or even-odd rule
|
||||
private static bool IsPointInsidePolygon(Position point, List<Position> polygon)
|
||||
{
|
||||
var intersections = 0;
|
||||
var n = polygon.Count;
|
||||
|
||||
for (var i = 0; i < n; i++)
|
||||
{
|
||||
var p1 = polygon[i];
|
||||
var p2 = polygon[(i + 1) % n];
|
||||
|
||||
if (p1.Y > point.Y != p2.Y > point.Y && point.X < (p2.X - p1.X) * (point.Y - p1.Y) / (p2.Y - p1.Y) + p1.X)
|
||||
{
|
||||
intersections++;
|
||||
}
|
||||
}
|
||||
|
||||
return intersections % 2 == 1;
|
||||
}
|
||||
|
||||
private static IEnumerable<(Position Pos1, Position Pos2)> GetPositionCombinations(List<Position> positions)
|
||||
{
|
||||
for (var i = 0; i < positions.Count; i++)
|
||||
{
|
||||
for (var j = i + 1; j < positions.Count; j++)
|
||||
{
|
||||
yield return (positions.ElementAt(i), positions.ElementAt(j));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private static long CalculateRectangleArea(Position pos1, Position pos2)
|
||||
{
|
||||
var length = Math.Abs(pos1.X - pos2.X) + 1;
|
||||
var width = Math.Abs(pos1.Y - pos2.Y) + 1;
|
||||
return length * width;
|
||||
}
|
||||
|
||||
private static Position[] GetRectangleCorners(Position pos1, Position pos2)
|
||||
{
|
||||
var minX = Math.Min(pos1.X, pos2.X);
|
||||
var maxX = Math.Max(pos1.X, pos2.X);
|
||||
var minY = Math.Min(pos1.Y, pos2.Y);
|
||||
var maxY = Math.Max(pos1.Y, pos2.Y);
|
||||
|
||||
return
|
||||
[
|
||||
(minX, minY),
|
||||
(maxX, minY),
|
||||
(maxX, maxY),
|
||||
(minX, maxY)
|
||||
];
|
||||
}
|
||||
|
||||
private IEnumerable<Position> GetPositions() => Input.Lines.Select(line =>
|
||||
{
|
||||
var values = line.Split(SplitChar);
|
||||
return (X: long.Parse(values[0]), Y: long.Parse(values[1]));
|
||||
});
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue