add until day05-1

day02/src/main.rs

@@ -0,0 +1,46 @@
+use itertools::Itertools;
+
+#[cfg(debug_assertions)]
+const FILENAME: &str = "example.txt";
+#[cfg(not(debug_assertions))]
+const FILENAME: &str = "input.txt";
+
+fn main() {
+    let data = std::fs::read_to_string(FILENAME).unwrap();
+
+    part_1(&data);
+    part_2(&data);
+}
+
+fn part_2(data: &str) {
+    let mut sum = 0;
+    for line in data.lines() {
+        let edges: Vec<_> = line
+            .split('x')
+            .map(|x| x.parse::<usize>().unwrap())
+            .collect();
+
+        let perimeter = edges.iter().sorted().take(2).sum::<usize>() * 2;
+        let volume = edges.iter().product::<usize>();
+
+        sum += perimeter + volume;
+    }
+    println!("{sum}");
+}
+
+fn part_1(data: &str) {
+    let mut sum = 0;
+    for line in data.lines() {
+        let sides: Vec<_> = line
+            .split('x')
+            .map(|x| x.parse::<usize>().unwrap())
+            .combinations(2)
+            .map(|x| x[0] * x[1])
+            .collect();
+
+        let smallest = sides.iter().min().copied().unwrap();
+
+        sum += sides.into_iter().sum::<usize>() * 2 + smallest;
+    }
+    println!("{sum}");
+}