part2 done

2022-aoc/src/d4.rs

@@ -0,0 +1,50 @@
+use std::ops::RangeInclusive;
+
+use aoc_runner_derive::{aoc as aoc_run, aoc_generator};
+
+type Contents = (RangeInclusive<u32>, RangeInclusive<u32>);
+
+#[aoc_generator(day4)]
+fn parse_input(input: &str) -> Vec<Contents> {
+    let mut out = Vec::with_capacity(input.len());
+    for line in input.lines() {
+        let mut split = line.split(',');
+        let a = split.next().unwrap();
+        let b = split.next().unwrap();
+        let mut asplit = a.split('-');
+        let mut bsplit = b.split('-');
+        let alo = asplit.next().unwrap().parse().unwrap();
+        let ahi = asplit.next().unwrap().parse().unwrap();
+        let blo = bsplit.next().unwrap().parse().unwrap();
+        let bhi = bsplit.next().unwrap().parse().unwrap();
+        out.push(((alo..=ahi), (blo..=bhi)));
+    }
+
+    out
+}
+
+#[aoc_run(day4, part1)]
+fn part1(scheds: &[Contents]) -> u32 {
+    let mut out = 0;
+    for (a, b) in scheds {
+        if (a.contains(b.start()) && a.contains(b.end()))
+            || (b.contains(a.start()) && b.contains(a.end()))
+        {
+            out += 1;
+        }
+    }
+    out
+}
+
+#[aoc_run(day4, part2)]
+fn part2(scheds: &[Contents]) -> u32 {
+    let mut out = 0;
+    for (a, b) in scheds {
+        if (a.contains(b.start()) || a.contains(b.end()))
+            || (b.contains(a.start()) || b.contains(a.end()))
+        {
+            out += 1;
+        }
+    }
+    out
+}