87 lines
3.3 KiB
Rust
87 lines
3.3 KiB
Rust
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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fn get_distance(a: (i64, i64), b: (i64, i64)) -> i64 {
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(a.0 - b.0).abs() + (a.1 - b.1).abs()
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}
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fn main() {
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let file_path = String::from("../aoc_15a/input");
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println!("In file {}", file_path);
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let mut sensors: Vec<(i64, i64)> = vec![];
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let mut beacon: Vec<(i64, i64)> = vec![];
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let mut distances: Vec<i64> = vec![];
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if let Ok(lines) = read_lines(file_path) {
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// Consumes the iterator, returns an (Optional) String
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for line in lines {
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if let Ok(ip) = line {
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let split = ip.split(" ")
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.enumerate()
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.filter(|&(i, _)| i == 2 || i == 3 || i == 8 || i == 9)
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.map(|(i, v)| v[2..v.len() - 1 + (i == 9) as usize].parse::<i64>().unwrap())
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.collect::<Vec<i64>>();
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sensors.push((split[0], split[1]));
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beacon.push((split[2], split[3]));
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distances.push((split[0] - split[2]).abs() + (split[1] - split[3]).abs());
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}
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}
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}
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let mut tool: Vec<(i64, i64, i64)> = vec![];
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for (i, _) in sensors.iter().enumerate() {
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for j in i + 1..sensors.len() {
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let distance = (sensors[i].0 - sensors[j].0).abs() + (sensors[i].1 - sensors[j].1).abs();
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let simple = (distance - distances[i] - distances[j]).abs();
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if simple == 2 {
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println!("Found something between {} and {}, {} {} {} {}", i, j, simple, distance, distances[i], distances[j]);
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let mut x = 0;
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let y = (sensors[i].1 + sensors[j].1) / 2;
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let mut d1 = (get_distance(sensors[i], (x, y)) - distances[i]).abs();
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let mut d2 = (get_distance(sensors[j], (x, y)) - distances[j]).abs();
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while d1 + d2 > 2 {
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d2 = (get_distance(sensors[j], (x, y)) - distances[j]).abs();
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d1 = (get_distance(sensors[i], (x, y)) - distances[i]).abs();
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x += 1;
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}
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println!("{} {} {} {}", d1, d2, x, y);
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d2 = (get_distance(sensors[j], (x + 1, y + 1)) - distances[j]).abs();
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d1 = (get_distance(sensors[i], (x + 1, y + 1)) - distances[i]).abs();
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if d1 + d2 == 2 {
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tool.push((x, y, 1));
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}
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else {
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tool.push((x, y, -1));
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}
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println!("{} {} {} {}", d1, d2, x, y);
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}
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}
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}
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println!("{:#?}", tool);
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let dir = tool[0].2;
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let mut a = (tool[0].0 - 3000000, tool[0].1 - 3000000 * dir);
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let b = (tool[1].0, tool[1].1);
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while (a.0 - b.0).abs() != (a.1 - b.1).abs() {
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a.0 += 1;
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a.1 += dir;
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}
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println!("{:?}", a);
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println!("{} {}", distances[6], get_distance(sensors[6], a));
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println!("{} {}", distances[29], get_distance(sensors[29], a));
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println!("{} {}", distances[24], get_distance(sensors[24], a));
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println!("{} {}", distances[31], get_distance(sensors[31], a));
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println!("{}", a.0 * 4000000 + a.1);
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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 P: AsRef<Path>, {
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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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