1 files changed, 27 insertions, 0 deletions
diff --git a/2016/aoc6/src/main.rs b/2016/aoc6/src/main.rs
new file mode 100644
index 0000000..45ae3b1
--- /dev/null
+++ b/2016/aoc6/src/main.rs
@@ -0,0 +1,27 @@
+use std::io::BufReader;
+use std::io::prelude::*;
+use std::fs::File;
+use std::collections::HashMap;
+
+fn main() {
+    let lines = read_file();
+    let answer_width = lines[0].len();
+    for i in 0..answer_width {
+        let line = lines.iter().map(|line| line.chars().nth(i).unwrap()).collect::<Vec<_>>();
+
+        let mut char_counts = HashMap::new();
+        for character in line {
+            *char_counts.entry(character).or_insert(0) += 1;
+        }
+        let (character, _) = char_counts.iter().min_by_key(|&(_, &count)| count).unwrap();
+        println!("{}", character);
+    }
+}
+
+fn read_file() -> Vec<String> {
+    let file = BufReader::new(File::open("test_input.txt").unwrap());
+    file.lines()
+        .map(|line| line.unwrap().trim().to_string())
+        .filter(|line| line.len() > 0)
+        .collect()
+}