Finished day 2

src/day_1.rs

@@ -1,10 +1,10 @@
-fn elf_calorie_counts(input: &String) -> Vec<u64> {
+fn elf_calorie_counts(input: &str) -> Vec<u64> {
     input.split("\n\n").map(|elf| {
         elf.split_whitespace().map(|meal| meal.parse().unwrap_or(0)).sum()
     }).collect()
 }
 
-pub fn part_1(input: &String) -> u64 {
+pub fn part_1(input: &str) -> u64 {
     let mut elf_calorie_counts= elf_calorie_counts(input);
 
     elf_calorie_counts.sort_unstable();
@@ -12,7 +12,7 @@ pub fn part_1(input: &String) -> u64 {
     elf_calorie_counts.pop().unwrap()
 }
 
-pub fn part_2(input: &String) -> u64 {
+pub fn part_2(input: &str) -> u64 {
     let mut elf_calorie_counts= elf_calorie_counts(input);
 
     elf_calorie_counts.sort_unstable();