2015: day01: finish
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4
Cargo.lock
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Cargo.lock
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# This file is automatically @generated by Cargo.
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# This file is automatically @generated by Cargo.
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# It is not intended for manual editing.
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# It is not intended for manual editing.
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[[package]]
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name = "aoc2015"
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version = "0.1.0"
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[[package]]
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[[package]]
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name = "aoc2018"
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name = "aoc2018"
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version = "0.1.0"
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version = "0.1.0"
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[workspace]
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[workspace]
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members = [
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members = [
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"aoc2015",
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"aoc2018",
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"aoc2018",
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"aoc2019",
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"aoc2019",
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]
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]
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9
aoc2015/Cargo.toml
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9
aoc2015/Cargo.toml
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[package]
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name = "aoc2015"
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version = "0.1.0"
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authors = ["Antoine Martin <antoine97.martin@gmail.com>"]
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edition = "2018"
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
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[dependencies]
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1
aoc2015/input/day01.txt
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1
aoc2015/input/day01.txt
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File diff suppressed because one or more lines are too long
81
aoc2015/src/day01.rs
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81
aoc2015/src/day01.rs
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use std::error::Error;
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use super::err;
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use super::Result;
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const INPUT: &str = include_str!("../input/day01.txt");
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pub fn run() -> Result<()> {
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println!("part 1: {}", part1(INPUT)?);
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println!("part 2: {}", part2(INPUT)?);
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Ok(())
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}
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fn part1(input: &str) -> Result<i64> {
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Ok(input
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.chars()
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.filter_map(|c| match c {
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'(' => Some(1),
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')' => Some(-1),
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_ => None,
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})
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.sum())
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}
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fn part2(input: &str) -> Result<usize> {
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let mut sum = 0;
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let mut res = 0;
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for (i, c) in input.chars().enumerate() {
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match c {
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'(' => sum += 1,
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')' => sum -= 1,
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_ => return Err(err!("unidentified character in input: {}", c)),
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};
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if sum < 0 {
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res = i + 1;
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break;
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}
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}
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match res {
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0 => Err(err!("never reached the basement...")),
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_ => Ok(res),
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn part1_provided() {
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assert_eq!(part1("(())").unwrap(), 0);
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assert_eq!(part1("()()").unwrap(), 0);
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assert_eq!(part1("(((").unwrap(), 3);
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assert_eq!(part1("(()(()(").unwrap(), 3);
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assert_eq!(part1("))(((((").unwrap(), 3);
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assert_eq!(part1("())").unwrap(), -1);
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assert_eq!(part1("))(").unwrap(), -1);
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assert_eq!(part1(")))").unwrap(), -3);
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assert_eq!(part1(")())())").unwrap(), -3);
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}
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#[test]
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fn part1_real() {
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assert_eq!(part1(INPUT).unwrap(), 74);
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}
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#[test]
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fn part2_provided() {
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assert_eq!(part2(")").unwrap(), 1);
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assert_eq!(part2("()())").unwrap(), 5);
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}
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#[test]
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fn part2_real() {
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assert_eq!(part2(INPUT).unwrap(), 1795);
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}
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}
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8
aoc2015/src/lib.rs
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8
aoc2015/src/lib.rs
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pub mod day01;
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pub type Result<T> = std::result::Result<T, Box<dyn std::error::Error>>;
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#[macro_export]
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macro_rules! err {
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($($string:expr),+) => (Box::<dyn Error>::from(format!($($string),+)))
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}
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29
aoc2015/src/main.rs
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29
aoc2015/src/main.rs
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use std::env;
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use aoc2015::day01;
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use aoc2015::Result;
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fn main() -> Result<()> {
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let days: &[fn() -> Result<()>] = &[day01::run];
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let mut args = env::args();
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args.next();
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match args.next() {
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Some(arg) => {
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let day: usize = arg.parse().expect("Please provide a day number");
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days[day - 1]().expect("error running day specified");
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}
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None => {
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for (i, day) in days.iter().enumerate() {
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let i = i + 1;
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println!("day{}: ", i);
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day().unwrap_or_else(|e| panic!("error running day {}: {}", i, e));
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println!();
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}
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}
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}
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Ok(())
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}
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