From 33db46ef6dcdddeb8e9c64ca6f18a1cedfe9de36 Mon Sep 17 00:00:00 2001
From: Justin Worthe <justin@worthe-it.co.za>
Date: Sat, 2 Dec 2017 07:26:08 +0200
Subject: Day 2

---
 src/bin/day_2.rs | 26 ++++++++++++++++++++++++++
 src/lib.rs       |  6 ++++++
 2 files changed, 32 insertions(+)
 create mode 100644 src/bin/day_2.rs

(limited to 'src')

diff --git a/src/bin/day_2.rs b/src/bin/day_2.rs
new file mode 100644
index 0000000..307029a
--- /dev/null
+++ b/src/bin/day_2.rs
@@ -0,0 +1,26 @@
+extern crate advent_of_code_2017;
+use advent_of_code_2017::*;
+
+fn main() {
+    let args = AdventArgs::init();
+    let sum = args.input.iter().map(|line| {
+        let splitline = parse_space_separated_ints(line).unwrap();
+        
+        if args.part == 1 {
+            let max = splitline.iter().max().unwrap();
+            let min = splitline.iter().min().unwrap();
+            max-min
+        } else {
+            for i in 0..splitline.len() {
+                for j in 0..splitline.len() {
+                    if i != j && splitline[i] % splitline[j] == 0  {
+                        return splitline[i] / splitline[j];
+                    }
+                }
+            }
+            panic!("Didn't find a dividing one! {:?}", splitline)
+        }
+    }).sum::<i32>();
+
+    println!("Checksum is {}", sum);
+}
diff --git a/src/lib.rs b/src/lib.rs
index c5a0f16..5d3721f 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -59,3 +59,9 @@ impl AdventArgs {
             .collect()
     }
 }
+
+pub fn parse_space_separated_ints(line: &String) -> Result<Vec<i32>, std::num::ParseIntError> {
+    line.split_whitespace()
+        .map(|x| x.parse::<i32>())
+        .collect()
+}
-- 
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