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Added Solution for 2021 day 05

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Burnus 2023-04-19 20:51:05 +02:00
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8
2021/day05_hydrothermal_venture/Cargo.toml Normal file
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[package]
name = "day05_hydrothermal_venture"
version = "0.1.0"
edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]

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2021/day05_hydrothermal_venture/challenge.txt Normal file
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You come across a field of [hydrothermal vents](https://en.wikipedia.org/wiki/Hydrothermal_vent) on the ocean floor! These vents constantly produce large, opaque clouds, so it would be best to avoid them if possible.
They tend to form in *lines*; the submarine helpfully produces a list of nearby lines of vents (your puzzle input) for you to review. For example:
```
0,9 -> 5,9
8,0 -> 0,8
9,4 -> 3,4
2,2 -> 2,1
7,0 -> 7,4
6,4 -> 2,0
0,9 -> 2,9
3,4 -> 1,4
0,0 -> 8,8
5,5 -> 8,2
```
Each line of vents is given as a line segment in the format `x1,y1 -> x2,y2` where `x1`,`y1` are the coordinates of one end the line segment and `x2`,`y2` are the coordinates of the other end. These line segments include the points at both ends. In other words:
* An entry like `1,1 -> 1,3` covers points `1,1`, `1,2`, and `1,3`.
* An entry like `9,7 -> 7,7` covers points `9,7`, `8,7`, and `7,7`.
For now, *only consider horizontal and vertical lines*: lines where either `x1 = x2` or `y1 = y2`.
So, the horizontal and vertical lines from the above list would produce the following diagram:
```
.......1..
..1....1..
..1....1..
.......1..
.112111211
..........
..........
..........
..........
222111....
```
In this diagram, the top left corner is `0,0` and the bottom right corner is `9,9`. Each position is shown as *the number of lines which cover that point* or `.` if no line covers that point. The top-left pair of `1`s, for example, comes from `2,2 -> 2,1`; the very bottom row is formed by the overlapping lines `0,9 -> 5,9` and `0,9 -> 2,9`.
To avoid the most dangerous areas, you need to determine *the number of points where at least two lines overlap*. In the above example, this is anywhere in the diagram with a `2` or larger - a total of `*5*` points.
Consider only horizontal and vertical lines. *At how many points do at least two lines overlap?*
Your puzzle answer was `6007`.
\--- Part Two ---
----------
Unfortunately, considering only horizontal and vertical lines doesn't give you the full picture; you need to also consider *diagonal lines*.
Because of the limits of the hydrothermal vent mapping system, the lines in your list will only ever be horizontal, vertical, or a diagonal line at exactly 45 degrees. In other words:
* An entry like `1,1 -> 3,3` covers points `1,1`, `2,2`, and `3,3`.
* An entry like `9,7 -> 7,9` covers points `9,7`, `8,8`, and `7,9`.
Considering all lines from the above example would now produce the following diagram:
```
1.1....11.
.111...2..
..2.1.111.
...1.2.2..
.112313211
...1.2....
..1...1...
.1.....1..
1.......1.
222111....
```
You still need to determine *the number of points where at least two lines overlap*. In the above example, this is still anywhere in the diagram with a `2` or larger - now a total of `*12*` points.
Consider all of the lines. *At how many points do at least two lines overlap?*
Your puzzle answer was `19349`.
Both parts of this puzzle are complete! They provide two gold stars: \*\*
At this point, you should [return to your Advent calendar](/2021) and try another puzzle.
If you still want to see it, you can [get your puzzle input](5/input).

132
2021/day05_hydrothermal_venture/src/lib.rs Normal file
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use core::fmt::Display;
use std::{num::ParseIntError, collections::{HashMap, HashSet}};
#[derive(Debug, PartialEq, Eq)]
pub enum ParseError {
ParseIntError(std::num::ParseIntError),
LineMalformed(String),
}
impl From<ParseIntError> for ParseError {
fn from(value: ParseIntError) -> Self {
Self::ParseIntError(value)
}
}
impl Display for ParseError {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
match self {
Self::ParseIntError(e) => write!(f, "Unable to parse into integer: {e}"),
Self::LineMalformed(v) => write!(f, "Line is malformed: {v}"),
}
}
}
struct Line {
start: (usize, usize),
end: (usize, usize),
}
impl TryFrom<&str> for Line {
type Error = ParseError;
fn try_from(value: &str) -> Result<Self, Self::Error> {
let ends: Vec<_> = value.split_whitespace().collect();
if ends.len() != 3 {
return Err(Self::Error::LineMalformed(value.to_string()));
}
let start: Vec<_> = ends[0].split(',').collect();
let end: Vec<_> = ends[2].split(',').collect();
if start.len() != 2 || end.len() != 2 {
return Err(Self::Error::LineMalformed(value.to_string()));
}
Ok(Self {
start: (start[0].parse()?, start[1].parse()?),
end: (end[0].parse()?, end[1].parse()?),
})
}
}
impl Line {
fn get_horizontal_vertical_coordinates(&self) -> Vec<(usize, usize)> {
if self.start.0 == self.end.0 {
let x = self.start.0;
let min = self.start.1.min(self.end.1);
let max = self.start.1.max(self.end.1);
(min..=max).map(|y| (x, y)).collect()
} else if self.start.1 == self.end.1 {
let y = self.start.1;
let min = self.start.0.min(self.end.0);
let max = self.start.0.max(self.end.0);
(min..=max).map(|x| (x, y)).collect()
} else {
Vec::new()
}
}
fn get_diagonal_coordingates(&self) -> Vec<(usize, usize)> {
if self.start.0 < self.end.0 && self.start.1 < self.end.1 {
(0..=self.end.0-self.start.0).map(|f| (self.start.0+f, self.start.1+f)).collect()
} else if self.start.0 < self.end.0 && self.start.1 > self.end.1 {
(0..=self.end.0-self.start.0).map(|f| (self.start.0+f, self.start.1-f)).collect()
} else if self.start.0 > self.end.0 && self.start.1 > self.end.1 {
(0..=self.start.0-self.end.0).map(|f| (self.start.0-f, self.start.1-f)).collect()
} else if self.start.0 > self.end.0 && self.start.1 < self.end.1 {
(0..=self.start.0-self.end.0).map(|f| (self.start.0-f, self.start.1+f)).collect()
} else {
Vec::new()
}
}
}
pub fn run(input: &str) -> Result<(usize, usize), ParseError> {
let lines: Vec<_> = input.lines().map(Line::try_from).collect::<Result<Vec<_>, _>>()?;
let mut all_points = HashSet::new();
let mut duplicates = HashSet::new();
lines.iter().for_each(|line| {
line.get_horizontal_vertical_coordinates().iter().for_each(|coord| {
if all_points.contains(coord) {
duplicates.insert(*coord);
}
all_points.insert(*coord);
});
});
let first = duplicates.len();
lines.iter().for_each(|line| {
line.get_diagonal_coordingates().iter().for_each(|coord| {
if all_points.contains(coord) {
duplicates.insert(*coord);
}
all_points.insert(*coord);
});
});
let second = duplicates.len();
Ok((first, second))
}
#[cfg(test)]
mod tests {
use super::*;
use std::fs::read_to_string;
fn read_file(name: &str) -> String {
read_to_string(name).expect(&format!("Unable to read file: {name}")[..]).trim().to_string()
}
#[test]
fn test_sample() {
let sample_input = read_file("tests/sample_input");
assert_eq!(run(&sample_input), Ok((5, 12)));
}
#[test]
fn test_challenge() {
let challenge_input = read_file("tests/challenge_input");
assert_eq!(run(&challenge_input), Ok((6007, 19349)));
}
}

500
2021/day05_hydrothermal_venture/tests/challenge_input Normal file
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818,513 -> 818,849
259,377 -> 259,599
120,758 -> 977,758
49,386 -> 170,386
773,644 -> 773,745
510,958 -> 797,671
480,438 -> 14,904
475,346 -> 648,173
620,167 -> 477,310
632,756 -> 275,756
225,896 -> 432,896
582,450 -> 93,450
402,262 -> 254,410
915,236 -> 709,236
338,530 -> 338,375
243,857 -> 370,984
32,449 -> 32,26
672,832 -> 203,363
426,961 -> 426,402
108,469 -> 550,27
567,698 -> 495,770
25,872 -> 861,36
12,15 -> 960,963
986,159 -> 986,765
912,437 -> 714,437
476,400 -> 476,873
125,52 -> 951,878
633,939 -> 633,641
12,986 -> 987,11
783,204 -> 467,520
547,834 -> 413,700
879,133 -> 879,890
409,128 -> 365,128
913,404 -> 913,598
798,40 -> 841,40
279,410 -> 279,758
935,807 -> 959,783
389,391 -> 389,38
271,736 -> 271,865
70,10 -> 814,10
694,266 -> 694,92
860,128 -> 860,966
755,871 -> 608,871
519,54 -> 519,833
817,733 -> 156,72
553,558 -> 726,558
152,21 -> 830,699
529,721 -> 608,721
744,719 -> 744,221
962,966 -> 10,14
863,813 -> 863,984
138,167 -> 801,830
926,901 -> 926,769
170,630 -> 623,177
281,207 -> 510,207
41,52 -> 945,956
100,204 -> 100,43
177,588 -> 469,588
946,37 -> 201,782
669,89 -> 669,868
945,32 -> 46,931
673,274 -> 412,274
424,979 -> 169,979
774,220 -> 774,571
684,272 -> 229,272
621,458 -> 621,884
222,964 -> 222,608
953,146 -> 145,954
442,736 -> 442,230
471,341 -> 471,124
632,954 -> 968,954
492,562 -> 911,981
485,320 -> 485,349
888,758 -> 888,23
271,555 -> 732,555
932,415 -> 792,275
399,478 -> 399,472
543,774 -> 543,261
422,872 -> 422,715
524,471 -> 445,471
573,513 -> 573,762
721,39 -> 482,39
379,482 -> 379,479
70,770 -> 336,770
797,724 -> 797,364
498,646 -> 498,410
756,19 -> 756,83
901,918 -> 11,918
572,23 -> 362,23
814,563 -> 750,627
279,736 -> 249,706
509,257 -> 509,897
127,374 -> 399,102
421,139 -> 607,139
79,520 -> 166,607
491,779 -> 284,986
395,606 -> 395,164
958,244 -> 442,760
493,509 -> 673,509
76,321 -> 482,727
903,926 -> 103,126
729,689 -> 63,23
956,13 -> 198,771
973,452 -> 193,452
282,362 -> 896,976
68,985 -> 985,68
148,109 -> 310,109
852,920 -> 371,439
334,41 -> 864,571
258,592 -> 72,778
259,990 -> 259,308
480,363 -> 480,751
943,153 -> 801,153
755,172 -> 123,804
355,501 -> 437,501
666,769 -> 340,769
982,10 -> 23,969
886,410 -> 886,669
454,410 -> 454,218
426,688 -> 227,688
969,959 -> 207,959
586,27 -> 591,22
852,133 -> 166,819
587,199 -> 781,199
78,85 -> 78,394
468,162 -> 727,162
261,473 -> 573,473
924,300 -> 924,873
651,817 -> 651,600
717,909 -> 717,187
898,656 -> 454,656
805,873 -> 507,873
529,825 -> 529,217
578,503 -> 783,503
929,663 -> 920,663
332,938 -> 332,381
710,783 -> 272,783
505,863 -> 240,863
146,548 -> 146,849
71,822 -> 820,73
875,883 -> 451,883
983,17 -> 30,970
646,350 -> 646,330
618,430 -> 881,430
398,977 -> 643,732
839,441 -> 406,874
948,358 -> 178,358
26,660 -> 26,612
418,467 -> 418,115
899,936 -> 899,611
770,430 -> 770,648
653,136 -> 95,694
645,153 -> 818,153
622,604 -> 77,59
470,597 -> 592,719
753,921 -> 743,921
507,821 -> 507,275
696,969 -> 433,969
48,284 -> 552,284
391,866 -> 187,866
571,897 -> 107,433
24,466 -> 24,186
949,587 -> 582,587
541,32 -> 541,583
12,984 -> 986,10
124,988 -> 124,904
209,548 -> 209,12
828,652 -> 34,652
455,460 -> 905,910
632,638 -> 343,638
371,275 -> 145,275
66,941 -> 945,62
672,286 -> 672,301
447,45 -> 82,410
665,683 -> 487,683
410,582 -> 670,842
917,705 -> 917,323
122,372 -> 403,653
970,47 -> 40,977
15,707 -> 732,707
666,854 -> 666,256
640,230 -> 188,230
71,297 -> 71,472
51,431 -> 339,431
957,363 -> 82,363
844,171 -> 274,171
184,81 -> 184,786
437,456 -> 138,456
326,478 -> 814,966
956,76 -> 226,806
399,572 -> 399,877
923,813 -> 923,898
445,221 -> 947,723
85,590 -> 415,590
644,127 -> 644,140
372,732 -> 372,522
413,186 -> 244,186
291,163 -> 197,69
889,41 -> 208,722
835,925 -> 835,616
790,340 -> 426,340
26,872 -> 805,93
617,701 -> 828,701
344,654 -> 530,654
940,989 -> 41,90
642,87 -> 206,523
306,54 -> 306,761
672,778 -> 672,868
29,959 -> 974,14
458,166 -> 86,166
565,394 -> 352,181
516,805 -> 457,805
464,450 -> 756,450
177,181 -> 661,181
962,394 -> 630,62
94,613 -> 12,613
932,159 -> 818,273
640,642 -> 976,642
184,346 -> 184,22
370,672 -> 458,672
235,334 -> 770,869
207,17 -> 811,17
351,25 -> 896,25
589,178 -> 921,510
672,733 -> 937,733
159,718 -> 787,90
598,317 -> 598,455
591,164 -> 591,374
276,321 -> 515,321
245,431 -> 245,350
268,976 -> 939,305
319,297 -> 823,297
246,132 -> 229,132
338,707 -> 338,59
723,402 -> 723,739
539,846 -> 94,846
879,458 -> 783,458
400,847 -> 770,477
111,957 -> 858,210
640,340 -> 878,578
613,446 -> 115,446
119,480 -> 119,425
447,34 -> 986,34
730,357 -> 532,555
85,283 -> 26,283
834,327 -> 263,898
739,580 -> 640,481
841,938 -> 841,123
987,979 -> 23,15
827,563 -> 632,563
313,419 -> 466,572
323,326 -> 455,326
976,683 -> 976,314
896,568 -> 338,568
733,464 -> 819,464
613,608 -> 493,608
178,137 -> 178,663
262,595 -> 262,308
535,268 -> 851,268
653,111 -> 653,723
947,47 -> 23,971
351,800 -> 351,806
143,49 -> 850,756
872,643 -> 872,265
946,727 -> 427,727
354,284 -> 938,868
652,874 -> 652,447
920,27 -> 387,27
816,265 -> 816,366
238,632 -> 336,534
593,399 -> 593,425
696,108 -> 138,666
828,110 -> 240,698
421,590 -> 847,590
409,449 -> 622,449
986,291 -> 45,291
580,34 -> 663,34
921,988 -> 35,102
619,88 -> 249,88
48,773 -> 503,773
277,560 -> 377,460
139,803 -> 123,787
339,688 -> 907,120
775,117 -> 775,203
237,287 -> 507,557
27,832 -> 429,430
70,592 -> 672,592
701,295 -> 69,295
723,672 -> 714,672
974,359 -> 292,359
439,462 -> 439,973
681,922 -> 357,922
402,521 -> 25,521
297,525 -> 297,227
763,797 -> 763,153
737,634 -> 869,634
379,875 -> 810,875
427,117 -> 705,117
785,376 -> 265,896
922,818 -> 141,37
61,371 -> 61,432
557,303 -> 411,303
573,100 -> 295,100
767,657 -> 231,657
11,938 -> 875,74
782,393 -> 782,502
899,913 -> 519,533
887,11 -> 244,654
730,271 -> 426,271
555,538 -> 379,538
871,866 -> 871,461
934,178 -> 934,845
741,327 -> 325,327
332,394 -> 518,580
673,372 -> 809,236
951,972 -> 77,98
985,585 -> 985,55
604,341 -> 269,676
408,70 -> 455,23
718,239 -> 718,522
15,16 -> 984,985
743,836 -> 852,836
407,59 -> 246,220
388,538 -> 388,587
978,249 -> 810,249
506,945 -> 506,644
657,101 -> 657,522
879,261 -> 935,261
751,625 -> 926,800
676,183 -> 573,286
272,491 -> 765,984
867,207 -> 570,207
117,784 -> 750,784
883,528 -> 883,845
430,765 -> 581,614
748,839 -> 748,775
265,16 -> 188,93
894,584 -> 525,215
278,414 -> 19,673
588,446 -> 588,656
469,676 -> 469,354
383,848 -> 669,848
212,341 -> 367,341
988,582 -> 988,825
296,187 -> 785,187
255,400 -> 255,286
756,886 -> 524,654
966,32 -> 966,940
711,243 -> 81,873
207,34 -> 359,186
555,850 -> 45,850
41,962 -> 947,56
15,888 -> 15,795
773,709 -> 579,515
228,517 -> 228,334
495,290 -> 965,290
462,309 -> 462,421
945,274 -> 945,735
547,361 -> 547,140
37,930 -> 836,930
987,445 -> 45,445
25,766 -> 757,34
643,946 -> 318,621
507,402 -> 507,981
22,903 -> 488,437
887,487 -> 957,487
57,434 -> 21,398
688,907 -> 917,678
146,498 -> 146,965
375,939 -> 888,426
966,151 -> 684,433
160,373 -> 722,373
410,571 -> 410,683
588,667 -> 588,337
832,348 -> 376,804
567,430 -> 453,430
368,442 -> 97,442
11,191 -> 584,764
647,965 -> 647,331
576,856 -> 976,456
205,287 -> 205,495
677,872 -> 677,246
21,16 -> 973,968
949,738 -> 126,738
921,595 -> 921,370
539,821 -> 660,821
143,188 -> 143,793
639,930 -> 639,454
522,360 -> 917,755
128,281 -> 647,800
456,365 -> 456,34
434,530 -> 431,530
549,792 -> 549,892
414,229 -> 41,602
289,468 -> 592,771
555,624 -> 727,452
187,780 -> 187,838
807,282 -> 807,968
52,249 -> 52,332
797,525 -> 462,190
295,562 -> 654,921
862,627 -> 252,627
22,116 -> 866,960
155,652 -> 155,979
598,748 -> 51,748
130,601 -> 231,601
468,183 -> 468,414
208,193 -> 927,912
25,755 -> 770,755
667,755 -> 916,506
395,103 -> 395,468
763,62 -> 763,153
371,816 -> 371,109
508,138 -> 37,609
464,983 -> 707,983
282,295 -> 282,536
646,680 -> 646,775
95,117 -> 95,62
606,963 -> 203,963
403,195 -> 97,195
743,293 -> 743,815
243,748 -> 431,748
953,54 -> 22,985
693,810 -> 656,810
163,221 -> 728,786
187,648 -> 187,337
98,559 -> 98,165
903,49 -> 46,906
600,779 -> 432,779
500,606 -> 500,878
812,797 -> 31,16
204,786 -> 517,786
952,757 -> 952,923
66,809 -> 66,831
479,72 -> 17,72
96,430 -> 96,932
346,667 -> 796,667
731,102 -> 162,102
755,846 -> 755,135
90,18 -> 404,18
828,802 -> 134,108
278,946 -> 278,765
289,163 -> 869,743
134,58 -> 887,58
354,735 -> 904,185
897,74 -> 897,716
508,904 -> 508,719
285,358 -> 795,868
51,155 -> 51,643
579,388 -> 431,240
79,330 -> 869,330
955,863 -> 140,48
800,473 -> 689,473
711,128 -> 918,128
787,166 -> 787,36
257,684 -> 873,68
984,986 -> 10,12
76,580 -> 660,580
265,868 -> 955,868
569,491 -> 466,594
535,654 -> 37,654
889,751 -> 411,273
681,491 -> 600,491
459,721 -> 459,109
824,130 -> 689,265
406,780 -> 406,965
18,31 -> 904,917
179,91 -> 232,38
280,552 -> 428,700
967,980 -> 19,32
47,289 -> 738,980
160,592 -> 120,592
710,412 -> 28,412
40,430 -> 747,430
435,821 -> 747,509
36,741 -> 36,363
787,30 -> 847,30
725,968 -> 725,940
739,356 -> 27,356
65,193 -> 419,193
318,513 -> 404,513
150,230 -> 150,968
847,410 -> 847,505
950,188 -> 950,278
816,312 -> 587,541
980,145 -> 154,145
79,781 -> 616,781
433,284 -> 433,309
624,264 -> 569,264
604,859 -> 570,825
936,691 -> 350,105
259,631 -> 648,242
445,27 -> 445,872
438,689 -> 977,150
718,603 -> 718,327
967,310 -> 98,310
439,381 -> 439,35
645,240 -> 282,240
475,54 -> 475,658
972,610 -> 759,823

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2021/day05_hydrothermal_venture/tests/sample_input Normal file
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@ -0,0 +1,10 @@
0,9 -> 5,9
8,0 -> 0,8
9,4 -> 3,4
2,2 -> 2,1
7,0 -> 7,4
6,4 -> 2,0
0,9 -> 2,9
3,4 -> 1,4
0,0 -> 8,8
5,5 -> 8,2