commit 0745e8103b73c29fea7891d10f238a6a1a187eb0 · aylac.top/advent_of_code

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2015/2/rust/Cargo.lock

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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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       version = 4

     

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       [[package]]

     

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       name = "either"

     

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       version = "1.15.0"

     

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       source = "registry+https://github.com/rust-lang/crates.io-index"

     

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       checksum = "48c757948c5ede0e46177b7add2e67155f70e33c07fea8284df6576da70b3719"

     

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       [[package]]

     

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       name = "itertools"

     

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       version = "0.14.0"

     

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       source = "registry+https://github.com/rust-lang/crates.io-index"

     

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       checksum = "2b192c782037fadd9cfa75548310488aabdbf3d2da73885b31bd0abd03351285"

     

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       dependencies = [

     

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        "either",

     

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       ]

     

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       [[package]]

     

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       name = "rust"

     

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       version = "0.1.0"

     

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       dependencies = [

     

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        "itertools",

     

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       ]

2015/2/rust/Cargo.toml

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       [package]

     

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       name = "rust"

     

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       version = "0.1.0"

     

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       edition = "2024"

     

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       [dependencies]

     

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       itertools = "0.14.0"

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2015/2/rust/src/main.rs

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       use itertools::Itertools;

     

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       fn main() {

     

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           let input = std::fs::read_to_string("../input.txt").expect("invalid input!!");

     

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           let input = input

     

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               .trim()

     

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               .split("\n")

     

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               .map(|v| v.split("x").map(|n| n.parse().expect("not a number")));

     

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           let part1 = input.clone().fold(0, |acc, v| {

     

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               let sides: Vec<i32> = v

     

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                   .combinations(2)

     

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                   .map(|pair| pair.into_iter().reduce(|a, b| a * b).unwrap())

     

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                   .collect();

     

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               let sides = sides.into_iter();

     

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               acc + sides.clone().fold(0, |acc, v| acc + v) * 2

     

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                   + sides.clone().reduce(|a, b| a.min(b)).unwrap()

     

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           });

     

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           println!("{part1}");

     

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           let part2 = input.clone().fold(0, |acc, v| {

     

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               let smallest_perimeter = v

     

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                   .clone()

     

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                   .map(|v| v * 2)

     

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                   .combinations(2)

     

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                   .map(|v| v.into_iter().fold(0, |a, b| a + b))

     

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                   .reduce(|a, b| a.min(b))

     

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                   .unwrap();

     

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               acc + smallest_perimeter + v.fold(1, |a, b| a * b)

     

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           });

     

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           println!("{part2}");

     

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       }

+1 -4

template/rust/src/main.rs

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       fn main() {

     

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           let input: String = match std::fs::read_to_string("../input.txt") {

     

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               Ok(input) => input,

     

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               _ => panic!("invalid input!!!"),

     

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           };

     

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           let input = std::fs::read_to_string("../input.txt").expect("invalid input!!");

     

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           println!("{}", &input);

     

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       }