diff --git a/src/bin/03.rs b/src/bin/03.rs
index 4dca334..2e84058 100644
--- a/src/bin/03.rs
+++ b/src/bin/03.rs
@@ -4,7 +4,7 @@ use itertools::Itertools;
 
 pub fn part_one(input: &str) -> Option<u32> {
     let mut visited = HashSet::with_capacity(input.len());
-    visited.insert((0,0));
+    visited.insert((0, 0));
     let mut x = 0;
     let mut y = 0;
     for direction in input.trim().chars() {
@@ -13,15 +13,15 @@ pub fn part_one(input: &str) -> Option<u32> {
             '<' => x -= 1,
             '^' => y += 1,
             'v' => y -= 1,
-            _ => panic!("oops")
+            _ => panic!("oops"),
         };
         visited.insert((x, y));
-    };
+    }
     Some(visited.len() as u32)
 }
 pub fn part_two(input: &str) -> Option<u32> {
     let mut visited = HashSet::with_capacity(input.len());
-    visited.insert((0,0));
+    visited.insert((0, 0));
     let (mut x1, mut y1, mut x2, mut y2) = (0, 0, 0, 0);
     for (santa, robot) in input.trim().chars().tuple_windows().step_by(2) {
         match santa {
@@ -29,7 +29,7 @@ pub fn part_two(input: &str) -> Option<u32> {
             '<' => x1 -= 1,
             '^' => y1 += 1,
             'v' => y1 -= 1,
-            _ => panic!("oops")
+            _ => panic!("oops"),
         };
         visited.insert((x1, y1));
         match robot {
@@ -37,10 +37,10 @@ pub fn part_two(input: &str) -> Option<u32> {
             '<' => x2 -= 1,
             '^' => y2 += 1,
             'v' => y2 -= 1,
-            _ => panic!("oops")
+            _ => panic!("oops"),
         };
         visited.insert((x2, y2));
-    };
+    }
     Some(visited.len() as u32)
 }
 fn main() {
diff --git a/src/bin/04.rs b/src/bin/04.rs
index fe7f775..27796a2 100644
--- a/src/bin/04.rs
+++ b/src/bin/04.rs
@@ -29,7 +29,9 @@ pub fn part_two(input: &str) -> Option<u32> {
         let mut output = [0; 16];
         hasher.result(&mut output);
 
-        if output.starts_with(&[0,0,0]) { return Some(x as u32)}
+        if output.starts_with(&[0, 0, 0]) {
+            return Some(x as u32);
+        }
         hasher.reset();
     }
     None
diff --git a/src/bin/06.rs b/src/bin/06.rs
index f3c7bc1..36897c1 100644
--- a/src/bin/06.rs
+++ b/src/bin/06.rs
@@ -63,19 +63,19 @@ impl From<&str> for Command {
 }
 
 pub fn part_one(input: &str) -> Option<u32> {
-    let mut a = [[0; 1000]; 1000];
+    let mut a = vec![[0; 1000]; 1000];
     for line in input.trim().split('\n') {
         let Command {
             instruction,
             from,
             to,
         } = Command::from(line);
-        for x in from.x..=to.x {
-            for y in from.y..=to.y {
+        for x in a.iter_mut().take(to.x + 1).skip(from.x) {
+            for y in x.iter_mut().take(to.y + 1).skip(from.y) {
                 match instruction {
-                    On => a[x][y] = 1,
-                    Off => a[x][y] = 0,
-                    Toggle => a[x][y] = 1 - a[x][y],
+                    On => *y = 1,
+                    Off => *y = 0,
+                    Toggle => *y = 1 - *y,
                 }
             }
         }
@@ -84,20 +84,20 @@ pub fn part_one(input: &str) -> Option<u32> {
 }
 
 pub fn part_two(input: &str) -> Option<u32> {
-    let mut a = [[0; 1000]; 1000];
+    let mut a = vec![[0; 1000]; 1000];
     for line in input.trim().split('\n') {
         let Command {
             instruction,
             from,
             to,
         } = Command::from(line);
-        for x in from.x..=to.x {
-            for y in from.y..=to.y {
+        for x in a.iter_mut().take(to.x + 1).skip(from.x) {
+            for y in x.iter_mut().take(to.y + 1).skip(from.y) {
                 match instruction {
-                    On => a[x][y] = 1,
-                    Off if a[x][y] > 0 => a[x][y] -= 1,
-                    Off => (),
-                    Toggle => a[x][y] += 2,
+                    On => *y += 1,
+                    Toggle => *y += 2,
+                    Off if y > &mut 0 => *y -= 1,
+                    _ => (),
                 }
             }
         }