From 331556e64dd4beed1223d749d9e21de8fff389c6 Mon Sep 17 00:00:00 2001
From: Justin Worthe <justin@worthe-it.co.za>
Date: Fri, 1 Dec 2017 07:12:21 +0200
Subject: Day 1: sum of characters

---
 src/bin/day_1.rs | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

(limited to 'src/bin/day_1.rs')

diff --git a/src/bin/day_1.rs b/src/bin/day_1.rs
index 7bcfcee..5d0e431 100644
--- a/src/bin/day_1.rs
+++ b/src/bin/day_1.rs
@@ -3,6 +3,22 @@ use advent_of_code_2017::*;
 
 fn main() {
     let args = AdventArgs::init();
+
+    let number_chars = args.input[0].chars().collect::<Vec<_>>();
+
+    let mut sum = 0;
+    
+    for i in 0..number_chars.len() {
+        let next = if args.part == 1 {
+            (i + 1)
+        } else {
+            (i + number_chars.len() / 2)
+        } % number_chars.len();
+        if (number_chars[i] == number_chars[next]) {
+            let parsed: i32 = number_chars[i].to_string().parse().unwrap();
+            sum += parsed;
+        }
+    }
     
-    println!("{:?} {:?}", args.part, args.input);
+    println!("Sum is {}", sum);
 }
-- 
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