diff options
Diffstat (limited to '24')
| -rw-r--r-- | 24/Cargo.toml | 11 | ||||
| -rw-r--r-- | 24/hex.txt | 42 | ||||
| -rw-r--r-- | 24/input | 302 | ||||
| -rw-r--r-- | 24/input.small | 20 | ||||
| -rw-r--r-- | 24/src/main.rs | 214 | ||||
| -rw-r--r-- | 24/tests/main.rs | 14 |
6 files changed, 603 insertions, 0 deletions
diff --git a/24/Cargo.toml b/24/Cargo.toml new file mode 100644 index 0000000..e9e1108 --- /dev/null +++ b/24/Cargo.toml @@ -0,0 +1,11 @@ +[package] +name = "advent_24" +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/24/hex.txt b/24/hex.txt new file mode 100644 index 0000000..424d099 --- /dev/null +++ b/24/hex.txt @@ -0,0 +1,42 @@ + ___ ___ + /0,0\___/2,0\___ + \___/1,0\___/3,0\ + /0,1\___/2,1\___/ + \___/1,1\___/3,1\ + /0,2\___/2,2\___/ + \___/1,2\___/3,2\ + \___/ \___/ + + + / \ / \ / \ / \ / \ / \ / \ / \ + / \ / \ / \ / \ / \ / \ / \ / \ + | | | | | | | | | + | | | | | | | | | + \ / \ / \ / \ / \ / \ / \ / \ / + \ / \ / \ / \ / \ / \ / \ / \ / + | | | | 1,1 | 3,1 | 5,1 | | + | | | | | | | | + / \ / \ / \ / \ / \ / \ / \ / \ + / \ / \ / \ / \ / \ / \ / \ / \ + | | | | 0,1 | 2,1 | 4,1 | 6,1 | | + | | | | | | | | | + \ / \ / \ / \ / \ / \ / \ / \ / + \ / \ / \ / \ / \ / \ / \ / \ / + | |-3,0 |-1,0 | 1,0 | 3,0 | 5,0 | | + | | | | | | | | + / \ / \ / \ / \ / \ / \ / \ / \ + / \ / \ / \ / \ / \ / \ / \ / \ + | |-4,0 |-2,0 | 0,0 | 2,0 | 4,0 | 6,0 | | + | | | | | | | | | + \ / \ / \ / \ / \ / \ / \ / \ / + \ / \ / \ / \ / \ / \ / \ / \ / + | |-3,-1|-1,-1| 1,-1| 3,-1| 5,-1| | + | | | | | | | | + / \ / \ / \ / \ / \ / \ / \ / \ + / \ / \ / \ / \ / \ / \ / \ / \ + | |-4,-1|-2,-1| 0,-1| 2,-1| 4,-1| 6,-1| | + | | | | | | | | | + \ / \ / \ / \ / \ / \ / \ / \ / + \ / \ / \ / \ / \ / \ / \ / \ / + | | | | | | | | + | | | | | | | | diff --git a/24/input b/24/input new file mode 100644 index 0000000..3d24ad2 --- /dev/null +++ b/24/input @@ -0,0 +1,302 @@ +nenwneswnwnwneswnenwnwsewenwsesw +swsesenwswswseseswseswneswseswsweswnese +neeswsesweneseeenwnenwnewneseewee +wseeeneseneneeeneneenweneewese +wwwwsewewsewnwwswwenewwwnww +seseneeseeswsenwswsewsewseseseneee +enesenesweseeswswswnwwnwne +swwwsenwwnwnwnwenwnenwnwsewsewwne 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-0,0 +1,20 @@ +sesenwnenenewseeswwswswwnenewsewsw +neeenesenwnwwswnenewnwwsewnenwseswesw +seswneswswsenwwnwse +nwnwneseeswswnenewneswwnewseswneseene +swweswneswnenwsewnwneneseenw +eesenwseswswnenwswnwnwsewwnwsene +sewnenenenesenwsewnenwwwse +wenwwweseeeweswwwnwwe +wsweesenenewnwwnwsenewsenwwsesesenwne +neeswseenwwswnwswswnw +nenwswwsewswnenenewsenwsenwnesesenew +enewnwewneswsewnwswenweswnenwsenwsw +sweneswneswneneenwnewenewwneswswnese +swwesenesewenwneswnwwneseswwne +enesenwswwswneneswsenwnewswseenwsese +wnwnesenesenenwwnenwsewesewsesesew +nenewswnwewswnenesenwnesewesw +eneswnwswnwsenenwnwnwwseeswneewsenese +neswnwewnwnwseenwseesewsenwsweewe +wseweeenwnesenwwwswnew diff --git a/24/src/main.rs b/24/src/main.rs new file mode 100644 index 0000000..21b3568 --- /dev/null +++ b/24/src/main.rs @@ -0,0 +1,214 @@ +use advent_lib::prelude::*; + +use std::collections::BTreeSet; +//use std::convert::TryFrom; + +#[derive(Clone,Copy)] +enum Dir { + East, + West, + Northeast, + Northwest, + Southeast, + Southwest, +} + + +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 tile_flips: BTreeSet<(isize,isize)> = BTreeSet::new(); + for line in &input { + let mut x: isize = 0; + let mut y: isize = 0; + let mut c_iter = line.chars(); + loop { + match c_iter.next() { + Some('e') => { + let (new_x, new_y) = adjacent_cell(x, y, Dir::East); + x = new_x; + y = new_y + //x += 2; + }, + Some('w') => { + let (new_x, new_y) = adjacent_cell(x, y, Dir::West); + x = new_x; + y = new_y + //x -= 2; + }, + Some('n') => { + match c_iter.next() { + Some('e') => { + let (new_x, new_y) = adjacent_cell(x, y, Dir::Northeast); + x = new_x; + y = new_y + /* + if x % 2 != 0 { + y += 1; + } + x += 1; + */ + }, + Some('w') => { + let (new_x, new_y) = adjacent_cell(x, y, Dir::Northwest); + x = new_x; + y = new_y + /* + if x % 2 != 0 { + y += 1; + } + x -= 1; + */ + }, + _ => { }, + } + }, + Some('s') => { + match c_iter.next() { + Some('e') => { + let (new_x, new_y) = adjacent_cell(x, y, Dir::Southeast); + x = new_x; + y = new_y + /* + if x % 2 == 0 { + y -= 1; + } + x += 1; + */ + }, + Some('w') => { + let (new_x, new_y) = adjacent_cell(x, y, Dir::Southwest); + x = new_x; + y = new_y + /* + if x % 2 == 0 { + y -= 1; + } + x -= 1; + */ + }, + _ => { }, + } + }, + None => break, + _ => { }, + } + } + + if !tile_flips.contains(&(x, y)) { + tile_flips.insert((x, y)); + } else { + tile_flips.remove(&(x, y)); + } + } + + println!("{}", tile_flips.len()); + + let mut state = tile_flips.clone(); + for _ in 0 .. 100 { + state = iterate(state); + } + + println!("{}", state.len()); + + Ok(()) +} + + +fn iterate(input_state: BTreeSet<(isize, isize)>) -> BTreeSet<(isize, isize)> { + let mut min_x = 0; + let mut min_y = 0; + let mut max_x = 0; + let mut max_y = 0; + + for (x, y) in &input_state { + if *x > max_x { + max_x = *x; + } + if *x < min_x { + min_x = *x; + } + if *y > max_y { + max_y = *y; + } + if *y < min_y { + min_y = *y; + } + } + + max_x += 2; + min_x -= 2; + max_y += 1; + min_y -= 1; + + let mut output_state: BTreeSet<(isize,isize)> = BTreeSet::new(); + + for y in min_y .. max_y + 1 { + for x in min_x .. max_x + 1 { + let mut adjacent_count = 0; + for direction in &[Dir::East, Dir::West, Dir::Northeast, Dir::Northwest, + Dir::Southeast, Dir::Southwest] + { + let adjacent_coordinates = adjacent_cell(x, y, *direction); + if input_state.contains(&adjacent_coordinates) { + adjacent_count += 1; + } + } + + if input_state.contains(&(x, y)) { + if adjacent_count >= 1 && adjacent_count <= 2 { + output_state.insert((x, y)); + } + } else { + if adjacent_count == 2 { + output_state.insert((x, y)); + } + } + } + } + + output_state +} + + +fn adjacent_cell(x: isize, y: isize, direction: Dir) -> (isize, isize) { + match direction { + Dir::East => (x + 2, y), + Dir::West => (x - 2, y), + Dir::Northeast => { + if x % 2 != 0 { + (x + 1, y + 1) + } else { + (x + 1, y) + } + }, + Dir::Northwest => { + if x % 2 != 0 { + (x - 1, y + 1) + } else { + (x - 1, y) + } + }, + Dir::Southeast => { + if x % 2 == 0 { + (x + 1, y - 1) + } else { + (x + 1, y) + } + }, + Dir::Southwest => { + if x % 2 == 0 { + (x - 1, y - 1) + } else { + (x - 1, y) + } + }, + } +} diff --git a/24/tests/main.rs b/24/tests/main.rs new file mode 100644 index 0000000..4b8bde1 --- /dev/null +++ b/24/tests/main.rs @@ -0,0 +1,14 @@ +use assert_cmd::prelude::*; +use std::process::Command; + + +#[test] +fn personal_input() -> Result<(), Box<dyn std::error::Error>> { + let mut command = Command::cargo_bin("advent_23")?; + + command.arg("input"); + command.assert().success().stdout("24798635\n12757828710\n"); + + Ok(()) +} + |