Day 16 part 1.

src/day16.rs

@@ -0,0 +1,55 @@
+use std::collections::HashMap;
+
+use aoc_runner_derive::{aoc, aoc_generator};
+
+#[aoc_generator(day16)]
+fn parse(input: &str) -> Vec<Sue> {
+    input.lines()
+        .map(|line| {
+            let (_, hints) = line.split_once(": ").unwrap();
+            let hints: Vec<_> = hints.split(", ").collect();
+            hints.into_iter().map(|thing| {
+                let (name, count) = thing.split_once(": ").unwrap();
+                (name.to_string(), count.parse().unwrap())
+            }).collect()
+        })
+        .collect()
+}
+
+#[aoc(day16, part1)]
+fn part1(input: &[Sue]) -> usize {
+    let known = "children: 3
+cats: 7
+samoyeds: 2
+pomeranians: 3
+akitas: 0
+vizslas: 0
+goldfish: 5
+trees: 3
+cars: 2
+perfumes: 1";
+    let known: Sue = known.split("\n")
+        .map(|line| {
+            let (name, count) = line.split_once(": ").unwrap();
+            (name.to_string(), count.parse().unwrap())
+        }).collect();
+
+    let sue = input.iter()
+        .enumerate()
+        .filter(|(_index, sue)| {
+            known.iter()
+                .all(|(property, _)| {
+                    !sue.contains_key(property) || known.get(property) == sue.get(property)
+                })
+        })
+        .next().unwrap();
+    sue.0 + 1
+}
+
+// #[aoc(day16, part2)]
+// fn part2(input: &[Ingredient]) -> i32 {
+//    0
+// }
+
+type Sue = HashMap<String, u8>;
+

src/lib.rs

@@ -8,5 +8,6 @@ mod day12;
 mod day13;
 mod day14;
 mod day15;
+mod day16;
 
 aoc_lib! { year = 2015 }