Add back day 3
This commit is contained in:
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5bf68a6003
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467..114..
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..35..633.
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617*......
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.....+.58.
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..592.....
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......755.
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.664.598..
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use std::fs::File;
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use std::io::{self, BufRead};
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use std::path::Path;
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enum Engine {
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Symbol(char),
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Number(u32),
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Empty,
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}
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pub fn part_one() {
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if let Ok(lines) = read_lines("./input.txt") {
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let matrix = create_matrix(lines);
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let result = process_matrix(&matrix);
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println!("{}", result);
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}
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}
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fn read_lines<P>(filename: P) -> io::Result<io::Lines<io::BufReader<File>>>
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where
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P: AsRef<Path>,
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{
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let file = File::open(filename)?;
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Ok(io::BufReader::new(file).lines())
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}
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fn create_matrix(lines: io::Lines<io::BufReader<File>>) -> Vec<Vec<Engine>> {
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let mut matrix: Vec<Vec<Engine>> = Vec::new();
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for (i, line) in lines.enumerate() {
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matrix.push(Vec::new());
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let line = line.unwrap();
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for ch in line.chars() {
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if ch == '.' {
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matrix[i].push(Engine::Empty);
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} else if ch.is_digit(10) {
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matrix[i].push(Engine::Number(ch.to_digit(10).unwrap()));
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} else {
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matrix[i].push(Engine::Symbol(ch));
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}
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}
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}
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return matrix;
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}
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fn process_matrix(matrix: &Vec<Vec<Engine>>) -> u32 {
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let mut result = 0;
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for i in 0..matrix.len() {
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let mut is_num = false;
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let mut num = 0;
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let mut found_symbol = false;
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for j in 0..matrix[i].len() {
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match matrix[i][j] {
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Engine::Number(value) => {
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if !found_symbol {
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found_symbol = check_symbol(&matrix, i, j);
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}
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if is_num {
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num = num * 10 + value;
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} else {
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num = value;
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}
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is_num = true;
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}
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_ => {
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if is_num && found_symbol {
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result += num;
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}
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is_num = false;
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found_symbol = false;
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num = 0;
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}
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}
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}
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if is_num && found_symbol {
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result += num;
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}
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}
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return result;
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}
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fn check_symbol(matrix: &Vec<Vec<Engine>>, x: usize, y: usize) -> bool {
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// There's probably a better way
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if x > 0 {
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if let Engine::Symbol(_) = matrix[x - 1][y] {
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return true;
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}
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if y > 0 {
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if let Engine::Symbol(_) = matrix[x - 1][y - 1] {
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return true;
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}
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}
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if y < matrix[x - 1].len() - 1 {
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if let Engine::Symbol(_) = matrix[x - 1][y + 1] {
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return true;
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}
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}
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}
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if y > 0 {
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if let Engine::Symbol(_) = matrix[x][y - 1] {
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return true;
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}
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}
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if y < matrix[x].len() - 1 {
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if let Engine::Symbol(_) = matrix[x][y + 1] {
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return true;
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}
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}
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if x < matrix.len() - 1 {
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if let Engine::Symbol(_) = matrix[x + 1][y] {
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return true;
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}
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if y > 0 {
|
||||
if let Engine::Symbol(_) = matrix[x + 1][y - 1] {
|
||||
return true;
|
||||
}
|
||||
}
|
||||
|
||||
if y < matrix[x + 1].len() - 1 {
|
||||
if let Engine::Symbol(_) = matrix[x + 1][y + 1] {
|
||||
return true;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
Loading…
Reference in New Issue