problem01

src/main.rs

@@ -1,7 +1,7 @@
 use tAoC2022::problem01;
 
 fn main() {
-    println!("Hello, world!");
-    problem01::solutionA();
-    problem01::solutionB();
+    println!("== Problem 01 ==");
+    println!("{}", problem01::solutionA());
+    println!("{}", problem01::solutionB());
 }

src/problem01/mod.rs

@@ -1,7 +1,36 @@
-pub fn solutionA() {
-    println!("this will eventually be a problem solution");
+static INPUT: &'static str = include_str!("input.txt");
+
+fn solution(x: i32) -> i32 {
+    let mut totals = vec![Default::default(); x.try_into().unwrap()];
+    let mut total = 0;
+    for line in INPUT.lines() {
+        if line == "" {
+            add_to_total(&mut totals, total);
+            total = 0;
+        } else {
+            let n: i32 = line.trim().parse().expect("invalid input");
+            total += n;
+        };
+    };
+    return totals.iter().sum();
 }
 
-pub fn solutionB() {
-    println!("this will eventually be a problem solution... B");
+fn add_to_total(totals: &mut Vec<i32>, total: i32) {
+    let mut i = total;
+    for n in totals.iter_mut() {
+        if i > *n {
+            let tmp = *n;
+            *n = i;
+            i = tmp;
+        };
+    };
 }
+
+pub fn solutionA() -> i32 {
+    return solution(1);
+}
+
+pub fn solutionB() -> i32 {
+    return solution(3);
+}
+