diff options
| -rw-r--r-- | .gitignore | 2 | ||||
| -rw-r--r-- | Cargo.lock | 16 | ||||
| -rw-r--r-- | Cargo.toml | 7 | ||||
| -rw-r--r-- | rustfmt.toml | 11 | ||||
| -rw-r--r-- | src/day_1.rs | 47 | ||||
| -rw-r--r-- | src/main.rs | 52 |
6 files changed, 135 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..3ceb93d --- /dev/null +++ b/.gitignore @@ -0,0 +1,2 @@ +/target +/input diff --git a/Cargo.lock b/Cargo.lock new file mode 100644 index 0000000..73a62f1 --- /dev/null +++ b/Cargo.lock @@ -0,0 +1,16 @@ +# This file is automatically @generated by Cargo. +# It is not intended for manual editing. +version = 3 + +[[package]] +name = "aoc2021" +version = "0.1.0" +dependencies = [ + "argparse", +] + +[[package]] +name = "argparse" +version = "0.2.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "3f8ebf5827e4ac4fd5946560e6a99776ea73b596d80898f357007317a7141e47" diff --git a/Cargo.toml b/Cargo.toml new file mode 100644 index 0000000..e09bbf2 --- /dev/null +++ b/Cargo.toml @@ -0,0 +1,7 @@ +[package] +name = "aoc2021" +version = "0.1.0" +edition = "2021" + +[dependencies] +argparse = "*" diff --git a/rustfmt.toml b/rustfmt.toml new file mode 100644 index 0000000..b7e6339 --- /dev/null +++ b/rustfmt.toml @@ -0,0 +1,11 @@ +brace_style = "AlwaysNextLine" +condense_wildcard_suffixes = true +control_brace_style = "ClosingNextLine" +fn_single_line = true +format_strings = true +imports_granularity = "Module" +match_block_trailing_comma = true +newline_style = "Unix" +group_imports = "StdExternalCrate" +struct_field_align_threshold = 15 +wrap_comments = true
\ No newline at end of file diff --git a/src/day_1.rs b/src/day_1.rs new file mode 100644 index 0000000..6632baa --- /dev/null +++ b/src/day_1.rs @@ -0,0 +1,47 @@ +pub fn run(input: Vec<String>) +{ + // Convert inputs to unsigned integer numbers + let input: Vec<u32> = input + .into_iter() + .map(|s| { + s.parse() + .expect("All lines are required to be unsigned integers") + }) + .collect(); + + part1(&input); + part2(&input); +} + +fn part1(input: &[u32]) +{ + let mut last_depth = u32::MAX; + let num_down_slopes = input + .iter() + .filter(|&depth| { + let going_deeper = *depth > last_depth; + last_depth = *depth; + + going_deeper + }) + .count(); + + println!("Solution to part 1: {}", num_down_slopes); +} + +fn part2(input: &[u32]) +{ + let mut last_aliased_depth = u32::MAX; + let num_aliased_down_slopes = input + .windows(3) + .filter(|&depths| { + let aliased_depth: u32 = depths.iter().sum(); + let going_deeper = aliased_depth > last_aliased_depth; + last_aliased_depth = aliased_depth; + + going_deeper + }) + .count(); + + println!("Solution to part 2: {}", num_aliased_down_slopes); +} diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..c45571e --- /dev/null +++ b/src/main.rs @@ -0,0 +1,52 @@ +mod day_1; + +use std::fs::File; +use std::io::{BufRead, BufReader}; +use std::path::PathBuf; +use std::str::FromStr; + +use argparse::{ArgumentParser, Store}; + +fn read_input(day: u8) -> Vec<String> +{ + let file_name = PathBuf::from_str("input") + .unwrap() + .join(format!("day_{}.txt", day)); + let input_file = + File::open(&file_name).expect(&format!("Unable to open input file {:?}", file_name)); + let reader = BufReader::new(input_file); + + reader + .lines() + .map(|r| r.expect("Unable to read line in input file")) + .collect() +} + +fn run(day: u8, input: Vec<String>) +{ + match day { + 1 => day_1::run(input), + o => panic!("Day {} is not implemented (yet)", o), + } +} + +fn main() +{ + let mut day: u8 = 1; + { + let mut ap = ArgumentParser::new(); + ap.set_description("Run advent of code 2015 solvers"); + + ap.refer(&mut day).add_option( + &["-d", "--day"], + Store, + "The day of the month of which the solver should be run", + ); + + ap.parse_args_or_exit(); + } + + println!("Attempting to solve day {}", day); + let input = read_input(day); + run(day, input); +} |