diff options
Diffstat (limited to '20')
| -rw-r--r-- | 20/Cargo.toml | 11 | ||||
| -rw-r--r-- | 20/input | 102 | ||||
| -rw-r--r-- | 20/small | 136 | ||||
| -rw-r--r-- | 20/src/main.rs | 128 | ||||
| -rw-r--r-- | 20/tests/main.rs | 19 |
5 files changed, 396 insertions, 0 deletions
diff --git a/20/Cargo.toml b/20/Cargo.toml new file mode 100644 index 0000000..21adb16 --- /dev/null +++ b/20/Cargo.toml @@ -0,0 +1,11 @@ +[package] +name = "advent_20" +version = "0.1.0" +authors = ["Irene Knapp <ireneista@gmail.com>"] +edition = "2018" + +[dependencies] +advent_lib = { path = "../lib" } + +[dev-dependencies] +assert_cmd = "0.10" diff --git a/20/input b/20/input new file mode 100644 index 0000000..0b3fda0 --- /dev/null +++ b/20/input @@ -0,0 +1,102 @@ +#.#.##..#..#..###.#.#....#.########.#.##.#..#.###..###.##.#.##.#.#.....#..##.#.#..###.###.######..#.#..#######.#..#....####..###.####.###.#.#######.#...#...#.##.###..###..##.#.#.###........##.#.....#.##.#.####...#...#.#..###.#.#...#....#...####..#.########.#...#.####.#####..#.#.###......#.##...###..##..#.#..#....#..###.#.##.....##.#####..##.####.#.###....##.###...#.##....##.#..#.#..#..#.##...#.##..#####.####.#.##...##...##...#.##.#.#.####..##...#.....#......#.#......#..###..#..##..##.###..#####..#..##.#..#. + 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+.#...##.....#.#...#...#.##.##..##.#.##.###.###.##.#..##.#.#.#.#..#.#.....####..#.....###.#.######### diff --git a/20/small b/20/small new file mode 100644 index 0000000..4e496e9 --- /dev/null +++ b/20/small @@ -0,0 +1,136 @@ +--- scanner 0 --- +404,-588,-901 +528,-643,409 +-838,591,734 +390,-675,-793 +-537,-823,-458 +-485,-357,347 +-345,-311,381 +-661,-816,-575 +-876,649,763 +-618,-824,-621 +553,345,-567 +474,580,667 +-447,-329,318 +-584,868,-557 +544,-627,-890 +564,392,-477 +455,729,728 +-892,524,684 +-689,845,-530 +423,-701,434 +7,-33,-71 +630,319,-379 +443,580,662 +-789,900,-551 +459,-707,401 + +--- scanner 1 --- +686,422,578 +605,423,415 +515,917,-361 +-336,658,858 +95,138,22 +-476,619,847 +-340,-569,-846 +567,-361,727 +-460,603,-452 +669,-402,600 +729,430,532 +-500,-761,534 +-322,571,750 +-466,-666,-811 +-429,-592,574 +-355,545,-477 +703,-491,-529 +-328,-685,520 +413,935,-424 +-391,539,-444 +586,-435,557 +-364,-763,-893 +807,-499,-711 +755,-354,-619 +553,889,-390 + +--- scanner 2 --- +649,640,665 +682,-795,504 +-784,533,-524 +-644,584,-595 +-588,-843,648 +-30,6,44 +-674,560,763 +500,723,-460 +609,671,-379 +-555,-800,653 +-675,-892,-343 +697,-426,-610 +578,704,681 +493,664,-388 +-671,-858,530 +-667,343,800 +571,-461,-707 +-138,-166,112 +-889,563,-600 +646,-828,498 +640,759,510 +-630,509,768 +-681,-892,-333 +673,-379,-804 +-742,-814,-386 +577,-820,562 + +--- scanner 3 --- +-589,542,597 +605,-692,669 +-500,565,-823 +-660,373,557 +-458,-679,-417 +-488,449,543 +-626,468,-788 +338,-750,-386 +528,-832,-391 +562,-778,733 +-938,-730,414 +543,643,-506 +-524,371,-870 +407,773,750 +-104,29,83 +378,-903,-323 +-778,-728,485 +426,699,580 +-438,-605,-362 +-469,-447,-387 +509,732,623 +647,635,-688 +-868,-804,481 +614,-800,639 +595,780,-596 + +--- scanner 4 --- +727,592,562 +-293,-554,779 +441,611,-461 +-714,465,-776 +-743,427,-804 +-660,-479,-426 +832,-632,460 +927,-485,-438 +408,393,-506 +466,436,-512 +110,16,151 +-258,-428,682 +-393,719,612 +-211,-452,876 +808,-476,-593 +-575,615,604 +-485,667,467 +-680,325,-822 +-627,-443,-432 +872,-547,-609 +833,512,582 +807,604,487 +839,-516,451 +891,-625,532 +-652,-548,-490 +30,-46,-14 diff --git a/20/src/main.rs b/20/src/main.rs new file mode 100644 index 0000000..1b4fc51 --- /dev/null +++ b/20/src/main.rs @@ -0,0 +1,128 @@ +use advent_lib::prelude::*; + + +fn main() -> Result<()> { + let mut args = std::env::args(); + if args.len() != 2 { + eprintln!("Usage: advent input"); + } + let _ = args.next(); + let filename = args.next().unwrap(); + + let input = advent_lib::read_lines_file(&filename)?; + + let mut iterator = input.iter(); + + let mut dictionary = Vec::new(); + for c in iterator.next().unwrap().chars() { + dictionary.push(match c { + '#' => 1, + '.' => 0, + _ => panic!("unexpected character"), + }); + } + + let _ = iterator.next(); + + let mut image = Vec::new(); + for line in iterator { + let mut row = Vec::new(); + for c in line.chars() { + row.push(match c { + '#' => 1, + '.' => 0, + _ => panic!("unexpected character"), + }); + } + image.push(row); + } + + let mut background = 0; + for _ in 0 .. 2 { + let (new_image, new_background) = + iterate(&image, background, &dictionary); + image = new_image; + background = new_background; + } + println!("{}", count_pixels(&image)); + + for _ in 2 .. 50 { + let (new_image, new_background) = + iterate(&image, background, &dictionary); + image = new_image; + background = new_background; + } + println!("{}", count_pixels(&image)); + + Ok(()) +} + + +fn iterate(input: &Vec<Vec<u8>>, background: u8, dictionary: &Vec<u8>) + -> (Vec<Vec<u8>>, u8) +{ + let height = input.len() as i64; + let width = input[0].len() as i64; + + let mut output = Vec::new(); + for y in -2 .. height+2 { + let mut row = Vec::new(); + for x in -2 .. width+2 { + let mut index: usize = 0; + + for offset_y in -1 .. 2 { + for offset_x in -1 .. 2 { + let computed_y: i64 = y + offset_y; + let computed_x: i64 = x + offset_x; + + + index *= 2; + if (computed_y >= 0) && (computed_y < height) + && (computed_x >= 0) && (computed_x < width) + { + index += input[computed_y as usize][computed_x as usize] as usize; + } else { + index += background as usize; + } + } + } + + row.push(dictionary[index]); + } + output.push(row); + } + + let output_background = dictionary[background as usize]; + + (output, output_background) +} + + +fn count_pixels(image: &Vec<Vec<u8>>) -> i64 { + let mut count = 0; + + for row in image { + for cell in row { + count += *cell as i64; + } + } + + count +} + + +#[allow(dead_code)] +fn debug_image(image: &Vec<Vec<u8>>) { + for row in image { + for cell in row { + if *cell == 1 { + print!("#"); + } else { + print!("."); + } + } + println!(""); + } + println!(""); +} + diff --git a/20/tests/main.rs b/20/tests/main.rs new file mode 100644 index 0000000..826e079 --- /dev/null +++ b/20/tests/main.rs @@ -0,0 +1,19 @@ +use assert_cmd::prelude::*; +//use predicates::prelude::*; +use std::process::Command; + + +#[test] +fn personal_input() -> Result<(), Box<dyn std::error::Error>> { + let mut command = Command::cargo_bin("advent_20")?; + + command.arg("small"); + command.assert().success().stdout( + "5573\n\ + 20097\n"); + + + + Ok(()) +} + |