Read input from file

src/bin/d1p1.rs

@@ -1,7 +1,8 @@
 use aoc22::day1;
+use aoc22::util;
 
 fn main() {
-    let elves = day1::read_elves();
+    let elves = day1::parse_elves(&util::parse_input());
 
     let max = elves.iter().max().unwrap();
     println!("The elf with the most calories is carrying {} cal", max);