Day 1

1 files changed, 24 insertions, 5 deletions

diff --git a/src/bin/day_1.rs b/src/bin/day_1.rs
index 7c9cdbf..9f54c70 100644
--- a/src/bin/day_1.rs
+++ b/src/bin/day_1.rs
@@ -4,15 +4,34 @@ use advent_of_code_2018::*;
 use std::error::Error;
 use std::path::PathBuf;
 
+use std::collections::HashSet;
+
 // cargo watch -cs "cargo run --bin day_1"
 
 fn main() -> Result<(), Box<Error>> {
     let input = read_file(&PathBuf::from("inputs/1.txt"))?;
-
-    println!("Input: {:?}", input);
-
-
-
+    let input_ints: Vec<i32> = input.iter().map(|str| str.parse::<i32>().unwrap()).collect();
+
+    println!("Input: {:?}", input_ints);
+
+    let sum: i32 = input_ints.iter().sum();
+    println!("Sum: {}", sum);
+
+    let mut seen = HashSet::new();
+    let mut acc = 0;
+    let mut repeat_found = false;
+    while !repeat_found {
+        for i in &input_ints {
+            if seen.contains(&acc) {
+                repeat_found = true;
+                break;
+            } else {
+                seen.insert(acc);
+            }
+            acc += i;
+        }
+    }
+    println!("First repeat: {}", acc);
 
     Ok(())
 }