Day 1: sum of characters

1 files changed, 17 insertions, 1 deletions

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);
 }