Working submission (part 2)
This commit is contained in:
parent
0900b54c13
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@ -5,3 +5,68 @@ version = 3
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[[package]]
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name = "aoc-vv"
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version = "0.1.0"
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dependencies = [
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"num-derive",
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"num-traits",
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]
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[[package]]
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name = "autocfg"
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version = "1.1.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
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[[package]]
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name = "num-derive"
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version = "0.2.5"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "eafd0b45c5537c3ba526f79d3e75120036502bebacbb3f3220914067ce39dbf2"
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dependencies = [
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"proc-macro2",
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"quote",
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"syn",
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]
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[[package]]
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name = "num-traits"
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version = "0.2.15"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "578ede34cf02f8924ab9447f50c28075b4d3e5b269972345e7e0372b38c6cdcd"
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dependencies = [
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"autocfg",
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]
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[[package]]
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name = "proc-macro2"
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version = "0.4.30"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "cf3d2011ab5c909338f7887f4fc896d35932e29146c12c8d01da6b22a80ba759"
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dependencies = [
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"unicode-xid",
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]
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[[package]]
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name = "quote"
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version = "0.6.13"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "6ce23b6b870e8f94f81fb0a363d65d86675884b34a09043c81e5562f11c1f8e1"
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dependencies = [
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"proc-macro2",
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]
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[[package]]
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name = "syn"
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version = "0.15.44"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "9ca4b3b69a77cbe1ffc9e198781b7acb0c7365a883670e8f1c1bc66fba79a5c5"
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dependencies = [
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"proc-macro2",
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"quote",
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"unicode-xid",
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]
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[[package]]
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name = "unicode-xid"
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version = "0.1.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
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@ -2,8 +2,10 @@
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name = "aoc-vv"
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version = "0.1.0"
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edition = "2021"
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default-run = "p01"
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default-run = "p02"
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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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num-traits = "0.2"
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num-derive = "0.2"
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File diff suppressed because it is too large
Load Diff
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@ -0,0 +1,165 @@
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use num_derive::FromPrimitive;
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use num_traits::FromPrimitive;
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use std::cmp::Ordering;
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use std::fs;
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use std::io::{self, BufRead};
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use std::str::FromStr;
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#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, FromPrimitive)]
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enum RPS {
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Rock = 0,
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Paper,
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Scissors,
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}
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impl FromStr for RPS {
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type Err = &'static str;
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fn from_str(input: &str) -> Result<Self, Self::Err> {
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match input {
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"A" | "X" => Ok(RPS::Rock),
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"B" | "Y" => Ok(RPS::Paper),
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"C" | "Z" => Ok(RPS::Scissors),
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_ => Err("Unknown move type!"),
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}
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}
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}
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impl Ord for RPS {
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fn cmp(&self, other: &Self) -> Ordering {
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match (self, other) {
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(x, y) if x == y => Ordering::Equal,
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(RPS::Rock, RPS::Scissors) | (RPS::Paper, RPS::Rock) | (RPS::Scissors, RPS::Paper) => {
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Ordering::Greater
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}
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_ => Ordering::Less,
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}
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}
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}
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impl RPS {
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fn score(self, theirs: RPS) -> u32 {
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self as u32
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+ 1
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+ match self.cmp(&theirs) {
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Ordering::Greater => 6,
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Ordering::Equal => 3,
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Ordering::Less => 0,
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}
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}
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fn play_against(self, win: bool) -> RPS {
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FromPrimitive::from_i8((self as i8 + if win { 1 } else { -1 }).rem_euclid(3)).unwrap()
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}
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}
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#[derive(Clone, Copy, Debug)]
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enum PlayStrat {
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Lose,
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Draw,
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Win,
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}
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impl FromStr for PlayStrat {
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type Err = &'static str;
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fn from_str(input: &str) -> Result<Self, Self::Err> {
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match input {
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"X" => Ok(Self::Lose),
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"Y" => Ok(Self::Draw),
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"Z" => Ok(Self::Win),
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_ => Err("Unknown strategy type!"),
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}
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}
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}
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impl PlayStrat {
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fn against(self, theirs: RPS) -> RPS {
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match self {
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Self::Draw => theirs,
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Self::Win => theirs.play_against(true),
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Self::Lose => theirs.play_against(false),
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}
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}
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}
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fn main() {
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let filename = "etc/p02.txt";
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let file = fs::File::open(filename).expect("Can't open file");
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let lines = io::BufReader::new(file).lines();
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let mut total_score: u32 = 0;
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for l in lines {
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let line = l.expect("Can't read line.");
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let mut split = line.split_ascii_whitespace();
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let theirs = split
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.next()
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.expect("Want two items per line")
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.parse::<RPS>()
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.expect("Can't get their move");
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let strat = split
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.next()
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.expect("Want two items per line")
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.parse::<PlayStrat>()
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.expect("Can't get my strategy");
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let mine = strat.against(theirs);
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let score = mine.score(theirs);
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total_score += score;
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println!(
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"Line \"{}\" - Theirs: {:?}, Strat: {:?}, Mine: {:?} ({:?}), score {} (so far {})",
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line,
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theirs,
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strat,
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mine,
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mine.cmp(&theirs),
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score,
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total_score,
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);
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}
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println!("Total score is {}", total_score);
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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 scores() {
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assert_eq!(7, RPS::Rock.score(RPS::Scissors));
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assert_eq!(8, RPS::Paper.score(RPS::Rock));
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assert_eq!(1, RPS::Rock.score(RPS::Paper));
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assert_eq!(6, RPS::Scissors.score(RPS::Scissors));
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}
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#[test]
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fn play_against() {
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assert_eq!(RPS::Paper, RPS::Rock.play_against(true));
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assert_eq!(RPS::Scissors, RPS::Paper.play_against(true));
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assert_eq!(RPS::Rock, RPS::Scissors.play_against(true));
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}
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#[test]
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fn strat_to_move() {
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assert_eq!(RPS::Paper, PlayStrat::Win.against(RPS::Rock));
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assert_eq!(RPS::Scissors, PlayStrat::Win.against(RPS::Paper));
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assert_eq!(RPS::Rock, PlayStrat::Win.against(RPS::Scissors));
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assert_eq!(RPS::Scissors, PlayStrat::Lose.against(RPS::Rock));
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assert_eq!(RPS::Rock, PlayStrat::Lose.against(RPS::Paper));
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assert_eq!(RPS::Rock, PlayStrat::Draw.against(RPS::Rock));
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}
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#[test]
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fn part_two_ex() {
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assert_eq!(4, PlayStrat::Draw.against(RPS::Rock).score(RPS::Rock));
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assert_eq!(1, PlayStrat::Lose.against(RPS::Paper).score(RPS::Paper));
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assert_eq!(
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7,
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PlayStrat::Win.against(RPS::Scissors).score(RPS::Scissors)
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);
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}
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}
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