From fb70e46dc0009c69f617135b0249cdda31b978bf Mon Sep 17 00:00:00 2001 From: Irene Knapp Date: Wed, 8 Dec 2021 21:28:44 -0800 Subject: 09 :) --- 08/tests/main.rs | 6 +-- 09/Cargo.toml | 11 +++++ 09/input | 100 +++++++++++++++++++++++++++++++++++++++ 09/src/main.rs | 140 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 09/tests/main.rs | 17 +++++++ Cargo.lock | 8 ++++ Cargo.toml | 1 + 7 files changed, 280 insertions(+), 3 deletions(-) create mode 100644 09/Cargo.toml create mode 100644 09/input create mode 100644 09/src/main.rs create mode 100644 09/tests/main.rs diff --git a/08/tests/main.rs b/08/tests/main.rs index e9b1eb4..0d8f9ba 100644 --- a/08/tests/main.rs +++ b/08/tests/main.rs @@ -5,12 +5,12 @@ use std::process::Command; #[test] fn personal_input() -> Result<(), Box> { - let mut command = Command::cargo_bin("advent_07")?; + let mut command = Command::cargo_bin("advent_08")?; command.arg("input"); command.assert().success().stdout( - "343441\n\ - 98925151\n"); + "255\n\ + 982158\n"); Ok(()) } diff --git a/09/Cargo.toml b/09/Cargo.toml new file mode 100644 index 0000000..a40c938 --- /dev/null +++ b/09/Cargo.toml @@ -0,0 +1,11 @@ +[package] +name = "advent_09" +version = "0.1.0" +authors = ["Irene Knapp "] +edition = "2018" + +[dependencies] +advent_lib = { path = "../lib" } + +[dev-dependencies] +assert_cmd = "0.10" diff --git a/09/input b/09/input new file mode 100644 index 0000000..57f275a --- /dev/null +++ b/09/input @@ -0,0 +1,100 @@ +9987532143456789996545678998976545699965434567899998795698764323456789543457899986533467894569896501 +9876321012367899989434567987997956989896546789998998634569843214567898732326789765422589923456789413 +8765432123478999878923459876789899878789987899987889545698755323678987651015697996201289312347994324 +9876553266599998967894569985895699768677898998765678956799898745689998542123456789412378925456795435 +7987654345678987656789698743434987654556789987654789897987987656789899653435667894323459434687896745 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Vec::new(); + for c in line.chars() { + let value: i64 = c.to_digit(10).unwrap() as i64; + row.push(value); + } + grid.push(row); + } + + let height = grid.len(); + let width = grid[0].len(); + + let mut sum = 0; + let mut low_points: Vec<(usize, usize)> = Vec::new(); + for y in 0 .. height { + for x in 0 .. width { + let here: i64 = grid[y][x]; + + if x > 0 { + let left = grid[y][x - 1]; + if here >= left { + continue; + } + } + + if x + 1 < width { + let right = grid[y][x + 1]; + if here >= right { + continue; + } + } + + if y > 0 { + let up = grid[y - 1][x]; + if here >= up { + continue; + } + } + + if y + 1 < height { + let down = grid[y + 1][x]; + if here >= down { + continue; + } + } + + let risk = here + 1; + + low_points.push((x, y)); + sum += risk; + } + } + println!("{}", sum); + + let mut basin_sizes: Vec = Vec::new(); + for (x, y) in &low_points { + let mut visited_grid = Vec::new(); + for _ in 0 .. height { + let mut visited_row = Vec::new(); + for _ in 0 .. width { + visited_row.push(false); + } + visited_grid.push(visited_row); + } + + let size = basin_size(*x, *y, &grid, &mut visited_grid); + basin_sizes.push(size); + } + basin_sizes.sort(); + + let mut result = 1; + result *= basin_sizes[basin_sizes.len() - 1]; + result *= basin_sizes[basin_sizes.len() - 2]; + result *= basin_sizes[basin_sizes.len() - 3]; + println!("{}", result); + + Ok(()) +} + + +fn basin_size(x: usize, y: usize, grid: &Vec>, + mut visited_grid: &mut Vec>) + -> i64 +{ + let mut size = 1; + visited_grid[y][x] = true; + + let height = grid.len(); + let width = grid[0].len(); + let here = grid[y][x]; + + if x > 0 { + let left_visited = visited_grid[y][x - 1]; + let left = grid[y][x - 1]; + if !left_visited && (here < left) && (left != 9) { + size += basin_size(x - 1, y, &grid, &mut visited_grid); + } + } + + if x + 1 < width { + let right_visited = visited_grid[y][x + 1]; + let right = grid[y][x + 1]; + if !right_visited && (here < right) && (right != 9) { + size += basin_size(x + 1, y, &grid, &mut visited_grid); + } + } + + if y > 0 { + let up_visited = visited_grid[y - 1][x]; + let up = grid[y - 1][x]; + if !up_visited && (here < up) && (up != 9) { + size += basin_size(x, y - 1, &grid, &mut visited_grid); + } + } + + if y + 1 < height { + let down_visited = visited_grid[y + 1][x]; + let down = grid[y + 1][x]; + if !down_visited && (here < down) && (down != 9) { + size += basin_size(x, y + 1, &grid, &mut visited_grid); + } + } + + size +} + diff --git a/09/tests/main.rs b/09/tests/main.rs new file mode 100644 index 0000000..ca042d2 --- /dev/null +++ b/09/tests/main.rs @@ -0,0 +1,17 @@ +use assert_cmd::prelude::*; +//use predicates::prelude::*; +use std::process::Command; + + +#[test] +fn personal_input() -> Result<(), Box> { + let mut command = Command::cargo_bin("advent_09")?; + + command.arg("input"); + command.assert().success().stdout( + "502\n\ + 1330560\n"); + + Ok(()) +} + diff --git a/Cargo.lock b/Cargo.lock index adf65dc..d1d0b51 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -64,6 +64,14 @@ dependencies = [ "assert_cmd", ] +[[package]] +name = "advent_09" +version = "0.1.0" +dependencies = [ + "advent_lib", + "assert_cmd", +] + [[package]] name = "advent_lib" version = "0.1.0" diff --git a/Cargo.toml b/Cargo.toml index e72d2a8..f10de33 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -9,4 +9,5 @@ members = [ "06", "07", "08", + "09", ] -- cgit 1.4.1