WIP: Day 6 2018

2018/src/bin/day6.rs

@@ -0,0 +1,55 @@
+#[macro_use]
+extern crate lazy_static;
+extern crate regex;
+
+use std::fs;
+
+use regex::Regex;
+
+#[derive(Debug)]
+struct Coordinate(i32, i32);
+
+fn main() {
+    let input = fs::read_to_string("input/day6.txt").expect("input");
+
+    let coordinates = input
+        .lines()
+        .map(parse_coord)
+        .collect::<Option<Vec<_>>>()
+        .expect("error parsing input");
+
+    part1(&coordinates);
+}
+
+fn part1(coordinates: &[Coordinate]) {
+    let max = furthest_coord(coordinates);
+    let grid = vec![None, max.0 * max.1];
+
+    // Now fill the grid with the coords...
+
+}
+
+fn furthest_coord(coordinates: &[Coordinate]) -> Coordinate {
+    // There are no negative coords, so assume origin at 0,0
+    let mut max = Coordinate(0, 0);
+    for Coordinate(x, y) in coordinates {
+        if *x > max.0 {
+            max.0= *x;
+        }
+
+        if *y > max.1 {
+            max.1 = *y;
+        }
+    }
+
+    max
+}
+
+fn parse_coord(line: &str) -> Option<Coordinate> {
+    lazy_static! {
+        static ref RE: Regex = Regex::new(r#"\A(\d+), (\d+)\z"#).unwrap();
+    }
+    let captures = RE.captures(line)?;
+
+    Some(Coordinate(captures[1].parse().ok()?, captures[2].parse().ok()?))
+}