solution: day16

src/bin/16.rs

@@ -0,0 +1,74 @@
+use lazy_static::lazy_static;
+use std::collections::HashMap;
+
+lazy_static! {
+    static ref MFCSAM: HashMap<String, u32> = HashMap::from([
+        ("children".to_string(), 3),
+        ("cats".to_string(), 7),
+        ("samoyeds".to_string(), 2),
+        ("pomeranians".to_string(), 3),
+        ("akitas".to_string(), 0),
+        ("vizslas".to_string(), 0),
+        ("goldfish".to_string(), 5),
+        ("trees".to_string(), 3),
+        ("cars".to_string(), 2),
+        ("perfumes".to_string(), 1),
+    ]);
+}
+pub fn part_one(input: &str) -> Option<u32> {
+    for line in input.lines() {
+        let (aunt, inventory) = line.split_once(": ").unwrap();
+        let n = aunt[4..].parse().unwrap();
+        let mut matching = true;
+        for (item, amount_str) in inventory.split(", ").map(|x| x.split_once(": ").unwrap()) {
+            let amount = amount_str.parse().unwrap();
+            if MFCSAM.get(item).unwrap() != &amount {
+                matching = false;
+                break;
+            }
+        }
+        if matching {
+            return Some(n);
+        }
+    }
+    None
+}
+pub fn part_two(input: &str) -> Option<u32> {
+    for line in input.lines() {
+        let (aunt, inventory) = line.split_once(": ").unwrap();
+        let n = aunt[4..].parse().unwrap();
+        let mut matching = true;
+        for (item, amount_str) in inventory.split(", ").map(|x| x.split_once(": ").unwrap()) {
+            let amount = amount_str.parse().unwrap();
+            match item {
+                "cats" | "trees" => {
+                    if MFCSAM.get(item).unwrap() >= &amount {
+                        matching = false;
+                        break;
+                    }
+                }
+                "pomeranians" | "goldfish" => {
+                    if MFCSAM.get(item).unwrap() <= &amount {
+                        matching = false;
+                        break;
+                    }
+                }
+                _ => {
+                    if MFCSAM.get(item).unwrap() != &amount {
+                        matching = false;
+                        break;
+                    }
+                }
+            }
+        }
+        if matching {
+            return Some(n);
+        }
+    }
+    None
+}
+fn main() {
+    let input = &aoc::read_file("inputs", 16);
+    aoc::solve!(1, part_one, input);
+    aoc::solve!(2, part_two, input);
+}