Day 4, puzzle 2

src/bin/d4p2.rs

@@ -0,0 +1,9 @@
+use aoc22::{day4, util};
+
+pub fn main() {
+    let assignments = day4::parse_assignments(&util::parse_input());
+
+    let overlapping = assignments.iter().filter(|a| a.0.overlaps(&a.1)).count();
+
+    println!("{} assignments overlap", overlapping);
+}