2015 day 2

2015/src/bin/day2.rs

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+use aoc::input;
+
+fn main() {
+    let lines = input::read_lines();
+    let dimensions: Vec<Vec<u32>> = lines.iter().map(|line| {
+        line.split('x').map(|dim| dim.parse::<u32>().unwrap()).collect()
+    }).collect();
+
+    // Part 1
+    let total: u32 = dimensions.iter().map(|dim| {
+        let (l, w, h) = (dim[0], dim[1], dim[2]);
+        let areas = vec!(l * w, w * h, h * l);
+        let slack = areas.iter().min().unwrap();
+        areas.iter().map(|a| 2 * a).sum::<u32>() + slack
+    }).sum();
+    println!("Needed paper: {}.", total);
+
+    // Part 2
+    let total: u32 = dimensions.iter().map(|dim| {
+        let mut sdim = dim.clone();
+        sdim.sort();
+        let (d1, d2, d3) = (sdim[0], sdim[1], sdim[2]);
+        let wrap = 2 * d1 + 2 * d2;
+        let bow = d1 * d2 * d3;
+        wrap + bow
+    }).sum();
+    println!("Needed ribbon: {}.", total);
+}

template.rs

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+use aoc::input;
+
+fn main() {
+
+}