1 files changed, 27 insertions, 0 deletions
diff --git a/src/day1.rs b/src/day1.rs
new file mode 100644
index 0000000..8aa966b
--- /dev/null
+++ b/src/day1.rs
@@ -0,0 +1,27 @@
+struct Foo {
+    acc: u32,
+    max: [u32;3],
+}
+
+pub fn run(input: String) {
+    let init = Foo{
+        acc: 0,
+        max: [0,0,0],
+    };
+    let res = input.lines().fold(init, |foo, line| {
+        return if line.is_empty() {
+            let mut arr = [foo.acc, foo.max[0], foo.max[1], foo.max[2]];
+            arr.sort();
+            Foo {
+                acc: 0,
+                max: [arr[1], arr[2], arr[3]],
+            }
+        } else {
+            Foo {
+                acc: foo.acc + line.parse::<u32>().expect("input line wasn't a u32!"),
+                max: foo.max,
+            }
+        }
+    });
+    println!("day 1: {}", res.max.into_iter().sum::<u32>());
+}
+\ No newline at end of file