Implement 2025 - Day 5 - Part 1

2025/05.rs

@@ -0,0 +1,37 @@
+---cargo
+---
+
+static CONTENT: &'static str = include_str!("./inputs/05_1.txt");
+
+fn main() {
+    let mut ranges: Vec<_> = CONTENT.lines().map(|l| l.trim()).take_while(|l| !l.is_empty()).map(|r| {
+        let (start, end) = r.split_once('-').unwrap();
+        let start = start.parse::<usize>().unwrap();
+        let end = end.parse::<usize>().unwrap();
+
+        start..=end
+    }).collect();
+    println!("Ranges: {:?}", ranges);
+
+    ranges.sort_by_key(|v| *v.start());
+    println!("Ranges: {:?}", ranges);
+
+    let ids: Vec<_> = CONTENT.lines().map(|l| l.trim()).skip_while(|l| !l.is_empty()).skip(1).map(|v| v.parse::<usize>().unwrap()).collect();
+    println!("IDs: {:?}", ids);
+
+
+    let fresh = ids.iter().filter(|id| {
+        for r in ranges.iter() {
+            if r.start() > id {
+                return false;
+            }
+
+            if r.contains(id) {
+                return true;
+            }
+        }
+
+        false
+    }).count();
+    println!("Fresh: {:?}", fresh);
+}