day03
This commit is contained in:
JonOfUs
parent
d15a8c359f
commit
173dc0f498
4 changed files with 222 additions and 2 deletions
140
res/03/input
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140
res/03/input
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......124..................418.......587......770...........672.................564............................438..........512......653....
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80
src/days/d03.rs
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80
src/days/d03.rs
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use regex::Regex;
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use std::collections::HashMap;
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use std::fs;
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pub fn solve() {
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let path = "res/03/input";
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let contents = fs::read_to_string(path).expect("I/O error, wrong path?");
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//let contents = io::BufReader::new(fs::File::open(path).expect("I/O error, wrong path?"));
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let grid: Vec<Vec<char>> = contents
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.lines()
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.map(|l| l.chars().collect::<Vec<char>>())
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.collect();
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let mut possible_gears = HashMap::<(usize, usize), Vec<usize>>::new();
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let result: usize = contents
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.lines()
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.enumerate()
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.map(|(yusize, line)| {
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let re = Regex::new(r"(\d+)").unwrap();
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let y = yusize as i32;
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let mut nums = Vec::<usize>::new();
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for (_, mat) in re.find_iter(line).enumerate() {
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if let Ok(number) = mat.as_str().parse::<usize>() {
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let x = mat.start() as i32;
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let len = number.to_string().len() as i32;
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let mut pos_to_check = vec![
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(x - 1, y - 1),
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(x - 1, y),
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(x - 1, y + 1),
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(x, y - 1),
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(x, y + 1),
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(x + len, y),
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];
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for i in 0..len {
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pos_to_check.push((x + 1 + i, y - 1));
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pos_to_check.push((x + 1 + i, y + 1));
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}
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if pos_to_check
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.iter()
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.filter(|(x, y)| {
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*x >= 0 && *y >= 0 && *y < grid.len() as i32 && *x < line.len() as i32
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})
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.map(|(x, y)| {
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if grid[*y as usize][*x as usize] == '*' {
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possible_gears
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.entry((*x as usize, *y as usize))
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.or_insert(vec![])
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.push(number);
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}
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(x, y)
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})
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.any(|(x, y)| {
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!grid[*y as usize][*x as usize].is_digit(10)
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&& grid[*y as usize][*x as usize] != '.'
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})
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{
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nums.push(number)
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}
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}
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}
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nums.iter().sum::<usize>()
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})
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.sum();
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println!("Result 1: {}", result);
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let result: usize = possible_gears
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.iter()
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.filter(|(_, vec)| vec.len() == 2)
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.map(|(_, vec)| vec.iter().product::<usize>())
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.sum();
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println!("Result 2: {}", result);
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}
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pub mod days;
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fn main() {
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days::d02::solve()
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days::d03::solve()
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//_all_days()
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}
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