diff --git a/2021/src/day21.rs b/2021/src/day21.rs
index 77043ba..2288259 100644
--- a/2021/src/day21.rs
+++ b/2021/src/day21.rs
@@ -139,11 +139,7 @@ pub fn part2(input: &mut dyn Read) -> String {
     let (a_wins, a_alive) = multiverse(a);
     let (b_wins, b_alive) = multiverse(b);
 
-    let a_winner: u64 = a_wins[1..]
-        .into_iter()
-        .zip(b_alive)
-        .map(|(&a, b)| a * b)
-        .sum();
+    let a_winner: u64 = a_wins[1..].iter().zip(b_alive).map(|(&a, b)| a * b).sum();
     let b_winner: u64 = b_wins.into_iter().zip(a_alive).map(|(a, b)| a * b).sum();
 
     a_winner.max(b_winner).to_string()
diff --git a/2021/src/day22.rs b/2021/src/day22.rs
index 836ef4e..dcbe98f 100644
--- a/2021/src/day22.rs
+++ b/2021/src/day22.rs
@@ -23,14 +23,17 @@ fn parse_range(input: &[u8]) -> IResult<&[u8], CRange> {
     })(input)
 }
 
-fn parse_input<'a>(input: &[u8]) -> IResult<&[u8], Vec<(bool, CRange, CRange, CRange)>> {
+fn parse_input(input: &[u8]) -> IResult<&[u8], Vec<(bool, [CRange; 3])>> {
     let parse_state = alt((map(tag("on x="), |_| true), map(tag("off x="), |_| false)));
-    let parse_line = tuple((
-        parse_state,
-        parse_range,
-        preceded(tag(",y="), parse_range),
-        preceded(tag(",z="), parse_range),
-    ));
+    let parse_line = map(
+        tuple((
+            parse_state,
+            parse_range,
+            preceded(tag(",y="), parse_range),
+            preceded(tag(",z="), parse_range),
+        )),
+        |(b, x, y, z)| (b, [x, y, z]),
+    );
 
     separated_list1(newline, parse_line)(input)
 }
@@ -45,7 +48,7 @@ pub fn part1(input: &mut dyn Read) -> String {
 
     let ranges = read_input(input, parse_input);
 
-    for (toggle, xr, yr, zr) in ranges {
+    for (toggle, [xr, yr, zr]) in ranges {
         for z in zr {
             if !valid_range.contains(&z) {
                 continue;