diff --git a/2018/day3/src/main.rs b/2018/day3/src/main.rs
index f88f0b1..2b2e3d5 100644
--- a/2018/day3/src/main.rs
+++ b/2018/day3/src/main.rs
@@ -9,8 +9,18 @@ fn get_coords_from_line(line: &String) -> (usize, usize, usize, usize) {
     let top_x = top_left_pieces.get(0).unwrap().parse::<usize>().unwrap();
     let top_y = top_left_pieces.get(1).unwrap().parse::<usize>().unwrap();
     let bottom_right_pieces: Vec<&str> = piece_dims.get(1).unwrap().split("x").collect();
-    let bottom_x = top_x + bottom_right_pieces.get(0).unwrap().parse::<usize>().unwrap();
-    let bottom_y = top_y + bottom_right_pieces.get(1).unwrap().parse::<usize>().unwrap();
+    let bottom_x = top_x
+        + bottom_right_pieces
+            .get(0)
+            .unwrap()
+            .parse::<usize>()
+            .unwrap();
+    let bottom_y = top_y
+        + bottom_right_pieces
+            .get(1)
+            .unwrap()
+            .parse::<usize>()
+            .unwrap();
     (top_x, top_y, bottom_x, bottom_y)
 }
 
diff --git a/2018/day5/src/main.rs b/2018/day5/src/main.rs
index 09b3d87..a7da65f 100644
--- a/2018/day5/src/main.rs
+++ b/2018/day5/src/main.rs
@@ -20,7 +20,7 @@ fn calc_remaining_monomers(polymers: &str) -> usize {
 }
 
 fn calc_most_significant_monomer(polymers: &str) {
-    let chars: Vec<char> = (b'a' ..= b'z').map(char::from).collect();
+    let chars: Vec<char> = (b'a'..=b'z').map(char::from).collect();
     let mut min_letter = 'a';
     let mut min_length = polymers.len();
     for mychar in chars.iter() {
@@ -32,7 +32,10 @@ fn calc_most_significant_monomer(polymers: &str) {
             min_length = new_len;
         }
     }
-    println!("minimum new length {} found by replacing {}", min_length, min_letter);
+    println!(
+        "minimum new length {} found by replacing {}",
+        min_length, min_letter
+    );
 }
 
 fn react_monomer(polymers: &str, r: Regex) -> usize {
diff --git a/2018/day6/src/main.rs b/2018/day6/src/main.rs
index 69579db..9178f08 100644
--- a/2018/day6/src/main.rs
+++ b/2018/day6/src/main.rs
@@ -1,7 +1,7 @@
+use std::collections::HashMap;
 use std::fs::File;
 use std::io::{BufRead, BufReader};
 use std::iter::Iterator;
-use std::collections::HashMap;
 
 struct Point {
     x: usize,
@@ -20,7 +20,13 @@ impl std::fmt::Display for Point {
     }
 }
 
-fn calc_max_area(points: &Vec<Point>, min_x: usize, min_y: usize, max_x: usize, max_y: usize) -> (u8, usize) {
+fn calc_max_area(
+    points: &Vec<Point>,
+    min_x: usize,
+    min_y: usize,
+    max_x: usize,
+    max_y: usize,
+) -> (u8, usize) {
     let distances = calc_distances(points, min_x, min_y, max_x, max_y);
     let mut areas: HashMap<u8, usize> = HashMap::new();
     for i in min_x..=max_x {
@@ -28,7 +34,10 @@ fn calc_max_area(points: &Vec<Point>, min_x: usize, min_y: usize, max_x: usize,
             if distances[i][j] == 0 {
                 continue;
             }
-            areas.entry(distances[i][j]).and_modify(|e| *e += 1).or_insert(1);
+            areas
+                .entry(distances[i][j])
+                .and_modify(|e| *e += 1)
+                .or_insert(1);
         }
     }
     let mut index = 0;
@@ -43,19 +52,27 @@ fn calc_max_area(points: &Vec<Point>, min_x: usize, min_y: usize, max_x: usize,
         }
     }
     for (key, value) in areas.iter() {
-        println!("{}: {} area {}", key, points.get((index - 1) as usize).unwrap(), value);
+        println!(
+            "{}: {} area {}",
+            key,
+            points.get((index - 1) as usize).unwrap(),
+            value
+        );
     }
     (max_area_index, max_area)
 }
 
-fn calc_distances(points: &Vec<Point>, min_x: usize, min_y: usize, max_x: usize, max_y: usize) -> [[u8; 500]; 500] {
+fn calc_distances(
+    points: &Vec<Point>,
+    min_x: usize,
+    min_y: usize,
+    max_x: usize,
+    max_y: usize,
+) -> [[u8; 500]; 500] {
     let mut distances = [[0u8; 500]; 500];
     for i in min_x..=max_x {
         for j in min_y..=max_y {
-            let cur_point = Point {
-                x: i,
-                y: j
-            };
+            let cur_point = Point { x: i, y: j };
             let mut min_dis = 500;
             let mut found_dupe = false;
             let mut min_index = 0;
@@ -114,17 +131,30 @@ fn main() {
     let mut max_x = 0;
     let mut max_y = 0;
     for point in points.iter() {
-        if point.x < min_x { min_x = point.x };
-        if point.x > max_x { max_x = point.x };
-        if point.y < min_y { min_y = point.y };
-        if point.y > max_y { max_y = point.y };
+        if point.x < min_x {
+            min_x = point.x
+        };
+        if point.x > max_x {
+            max_x = point.x
+        };
+        if point.y < min_y {
+            min_y = point.y
+        };
+        if point.y > max_y {
+            max_y = point.y
+        };
     }
     let width = max_x - min_x;
     let height = max_y - min_y;
     println!("map size {}x{}", width, height);
     let (max_area_point, max_area) = calc_max_area(&points, min_x, min_y, max_x, max_y);
     let max_area_point_index = (max_area_point - 1) as usize;
-    println!("max area point {} {} is {}", max_area_point, points.get(max_area_point_index).unwrap(), max_area);
+    println!(
+        "max area point {} {} is {}",
+        max_area_point,
+        points.get(max_area_point_index).unwrap(),
+        max_area
+    );
     let safe_zone = calc_safe_zone(&points, 10000);
     println!("safe zone area {}", safe_zone);
 }
diff --git a/2018/day7/src/main.rs b/2018/day7/src/main.rs
index 236a0c0..9567613 100644
--- a/2018/day7/src/main.rs
+++ b/2018/day7/src/main.rs
@@ -1,7 +1,7 @@
+use std::collections::{BTreeMap, HashMap};
 use std::fs::File;
 use std::io::{BufRead, BufReader};
 use std::iter::Iterator;
-use std::collections::{BTreeMap, HashMap};
 
 type Day7Map = BTreeMap<char, Vec<char>>;
 
@@ -23,7 +23,7 @@ fn calc_order(steps: &mut Day7Map) -> String {
             first_available = *key;
             break;
         }
-    };
+    }
 
     let mut final_result = String::from("");
     if first_available == '_' {
@@ -93,9 +93,12 @@ fn main() {
         let mut chars = line_str.chars();
         let prereq = chars.nth(5).unwrap();
         let target = chars.nth(30).unwrap();
-        steps.entry(target).and_modify(|e| e.push(prereq)).or_insert(vec![prereq]);
+        steps
+            .entry(target)
+            .and_modify(|e| e.push(prereq))
+            .or_insert(vec![prereq]);
         steps.entry(prereq).or_insert(vec![]);
-    };
+    }
     print_map(&steps);
     let order = calc_order(&mut steps.clone());
     println!("final order: {}", order);
diff --git a/2018/day8/src/main.rs b/2018/day8/src/main.rs
index 03c1c43..462bf38 100644
--- a/2018/day8/src/main.rs
+++ b/2018/day8/src/main.rs
@@ -45,10 +45,16 @@ fn calc_node_sum(ints: &mut Vec<i32>) -> i32 {
 
 fn main() {
     let mut line = String::new();
-    BufReader::new(File::open("input").unwrap()).read_line(&mut line).unwrap();
+    BufReader::new(File::open("input").unwrap())
+        .read_line(&mut line)
+        .unwrap();
     let len_withoutcrlf = line.trim_right().len();
     line.truncate(len_withoutcrlf);
-    let ints: Vec<i32> = line.as_str().split(" ").map(|i| i.parse::<i32>().unwrap()).collect();
+    let ints: Vec<i32> = line
+        .as_str()
+        .split(" ")
+        .map(|i| i.parse::<i32>().unwrap())
+        .collect();
     let sum = calc_metadata_sum(&mut ints.clone());
     println!("part 1 sum is {}", sum);
     let sum2 = calc_node_sum(&mut ints.clone());