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+off x=52204..70316,y=21707..45143,z=24511..43927
+off x=27774..33872,y=30457..60549,z=52881..74012
+off x=-67751..-48677,y=6535..14109,z=41406..63051
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+on x=-32225..-15877,y=21103..45553,z=-66267..-46475
+off x=-53085..-35827,y=-36046..-19282,z=55940..62461
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+on x=-86721..-52575,y=18886..39871,z=-27525..-18940
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+on x=17053..48276,y=8196..30921,z=-90002..-67999
+off x=30567..51548,y=48492..49629,z=-60064..-40577
+off x=-11485..16121,y=49496..85403,z=-58551..-28464
+off x=-71575..-66788,y=-28618..-14850,z=25881..53946
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+on x=-92343..-73224,y=-5440..30589,z=-11302..13705
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+off x=-48001..-30155,y=-34640..-8100,z=-68127..-58824
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+off x=-40498..-13375,y=-21960..-1763,z=-89263..-65000
+on x=19554..31662,y=55672..61731,z=-60358..-37905
+on x=-39219..-7291,y=35227..63484,z=-72685..-36545
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+on x=19674..39635,y=-73170..-53816,z=-59139..-34916
+on x=-2303..14767,y=69085..89874,z=-44748..-25607
+off x=-41923..-21656,y=-11475..12712,z=-92655..-63472
+off x=-65609..-28677,y=49338..76417,z=-17143..20767
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+off x=-36833..-8071,y=11487..45001,z=-74496..-55088
+on x=-33089..-16969,y=-41928..-15082,z=-82121..-64107
diff --git a/2021/src/bin/day22.rs b/2021/src/bin/day22.rs
new file mode 100644
index 0000000..57ef00c
--- /dev/null
+++ b/2021/src/bin/day22.rs
@@ -0,0 +1,603 @@
+#![feature(drain_filter)]
+#![feature(array_windows)]
+#![feature(test)]
+extern crate test;
+use itertools::{iproduct, Itertools};
+use std::{collections::HashSet, ops::Range};
+
+type Parsed = Vec<(Cube, bool)>;
+
+#[derive(Debug, PartialEq, Clone, Hash, Eq)]
+struct Cube {
+    x: Range<isize>,
+    y: Range<isize>,
+    z: Range<isize>,
+}
+
+impl Cube {
+    fn contains(&self, other: &Cube) -> bool {
+        self.x.start <= other.x.start
+            && self.x.end >= other.x.end
+            && self.y.start <= other.y.start
+            && self.y.end >= other.y.end
+            && self.z.start <= other.z.start
+            && self.z.end >= other.z.end
+    }
+
+    fn intersects(&self, Cube { x: x2, y: y2, z: z2 }: &Cube) -> bool {
+        let Cube { x: x1, y: y1, z: z1 } = self;
+        !((x1.end < x2.start || x2.end < x1.start)
+            && (y1.end < y2.start || y2.end < y1.start)
+            && (z1.end < z2.start || z2.end < z1.start))
+    }
+
+    fn split(self, other: Cube) -> Vec<Cube> {
+        if !self.intersects(&other) {
+            return vec![self, other];
+        }
+        let Cube { x: x1, y: y1, z: z1 } = self;
+        let Cube { x: x2, y: y2, z: z2 } = other;
+        let mut xs = vec![x1.start, x1.end, x2.start, x2.end];
+        xs.sort_unstable();
+        let mut ys = vec![y1.start, y1.end, y2.start, y2.end];
+        ys.sort_unstable();
+        let mut zs = vec![z1.start, z1.end, z2.start, z2.end];
+        zs.sort_unstable();
+        xs.push(xs[xs.len() - 1] + 1);
+        ys.push(ys[ys.len() - 1] + 1);
+        zs.push(zs[zs.len() - 1] + 1);
+        iproduct!(xs.array_windows::<2>(), ys.array_windows::<2>(), zs.array_windows::<2>())
+            // .inspect(|x| println!("{x:?}"))
+            .map(|(&[x1, x2], &[y1, y2], &[z1, z2])| Cube { x: x1..x2 - 1, y: y1..y2 - 1, z: z1..z2 - 1 })
+            .filter(|Cube { x, y, z }| x.start <= x.end && y.start <= y.end && z.start <= z.end)
+            .collect()
+    }
+
+    fn len(&self) -> usize {
+        (self.x.len() + 1) * (self.y.len() + 1) * (self.z.len() + 1)
+    }
+
+    fn try_combine(self, Cube { x: x2, y: y2, z: z2 }: Cube) -> Option<Cube> {
+        // println!("Trying to combine {self:?} with ({x2:?}, {y2:?}, {z2:?})");
+        let Cube { x: x1, y: y1, z: z1 } = self;
+        if x1 == x2 && y1 == y2 && z1 == z2 {
+            return Some(Cube { x: x1, y: y1, z: z1 });
+        }
+        if x1 == x2 && y1 == y2 && (z1.end == z2.start || z2.end == z1.start) {
+            return Some(Cube { x: x1, y: y1, z: z1.start.min(z2.start)..z1.end.max(z2.end) });
+        }
+        if x1 == x2 && z1 == z2 && (y1.end == y2.start || y2.end == y1.start) {
+            return Some(Cube { x: x1, y: y1.start.min(y2.start)..y1.end.max(y2.end), z: z1 });
+        }
+        if z1 == z2 && y1 == y2 && (x1.end == x2.start || x2.end == x1.start) {
+            return Some(Cube { x: x1.start.min(x2.start)..x1.end.max(x2.end), y: y1, z: z1 });
+        }
+        // println!("Did not combine");
+        None
+    }
+}
+
+#[allow(non_upper_case_globals)]
+const on: bool = true;
+#[allow(non_upper_case_globals)]
+const off: bool = false;
+
+macro_rules! parse {
+    ($($b: ident x=$x: expr,y=$y: expr,z=$z: expr)*) => {
+        [$( (Cube { x: $x, y: $y, z: $z, }, $b), )*].to_vec()
+    };
+}
+
+fn part1(parsed: &Parsed) -> usize {
+    let mut cubes: Vec<Cube> = vec![];
+    for (new_cube, state) in parsed {
+        if new_cube.x.start.abs() > 50 {
+            break;
+        }
+        let new_intersections: HashSet<_> = cubes
+            .drain_filter(|c| c.intersects(&new_cube))
+            .flat_map(|cube| {
+                let mut cube_copy = new_cube.clone();
+                // println!("new: {new_cube:?}");
+                /*
+                if !state {
+                    cube_copy.x.end += 1;
+                    cube_copy.y.end += 1;
+                    cube_copy.z.end += 1;
+                }*/
+                let mut cs = cube.clone().split(cube_copy);
+                if *state {
+                    cs.drain_filter(|c| !cube.contains(c) && !new_cube.contains(c));
+                } else {
+                    cs.retain(|c| cube.contains(c) && !new_cube.contains(c));
+                    // cs.drain_filter(|c| !(cube.contains(c) && !new_cube.contains(c)))
+                        // .for_each(|c| println!("Turning off {c:?} because it’s in {new_cube:?} or not in {cube:?}"));
+                }
+                cs
+            })
+            .collect();
+        if new_intersections.is_empty() && *state {
+            cubes.push(new_cube.clone());
+        } else {
+            for e in new_intersections {
+                cubes.push(e);
+            }
+        }
+        let con: usize = cubes
+            .iter()
+            // .inspect(|c| println!("{c:?}")) //
+            .map(Cube::len)
+            .sum();
+        println!("{con}");
+        /*
+        let v = cubes
+            .iter()
+            .flat_map(|Cube { x, y, z }| iproduct!(x.start..=x.end, y.start..=y.end, z.start..=z.end))
+            .sorted_unstable_by_key(|(x, y, z)| x * 10000 + y * 100 + z)
+            .collect_vec();
+        // println!("{v:?}");
+        */
+    }
+    cubes.iter().map(Cube::len).sum()
+    // cubes.into_iter().inspect(|c| println!("{c:?}")).flat_map(Cube::points).collect::<HashSet<_>>().len()
+}
+
+fn part2(parsed: &Parsed) -> usize {
+    todo!()
+}
+
+fn main() {
+    let input = parse_input();
+    println!("Part 1: {}", part1(&input));
+    println!("Part 2: {}", part2(&input));
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use aoc2021::*;
+
+    #[test]
+    fn part1_test() {
+        let input = parse! {
+            on x=10..12,y=10..12,z=10..12
+            on x=11..13,y=11..13,z=11..13
+            off x=9..11,y=9..11,z=9..11
+            on x=10..10,y=10..10,z=10..10
+        };
+        assert_eq!(part1(&input), 39);
+    }
+
+    #[test]
+    fn contains_top_right_test() {
+        let c = Cube { x: 9..11, y: 9..11, z: 9..11 };
+        let tr = Cube { x: 11..11, y: 11..11, z: 11..11 };
+        assert!(c.contains(&tr));
+        assert!(c.intersects(&tr));
+    }
+}
+
+fn parse_input() -> Parsed {
+    parse! {
+        on x=-13..37,y=-36..14,z=-3..45
+        on x=-1..43,y=-15..32,z=-35..15
+        on x=-7..44,y=-6..48,z=-13..38
+        on x=-42..3,y=-42..10,z=-3..44
+        on x=-34..13,y=-27..27,z=-31..23
+        on x=-14..39,y=-34..10,z=-40..10
+        on x=-12..34,y=-25..19,z=-32..15
+        on x=-47..6,y=-29..20,z=-45..9
+        on x=-37..16,y=-17..34,z=-25..29
+        on x=-28..20,y=-19..34,z=-3..47
+        off x=1..19,y=-30..-14,z=19..33
+        on x=-34..19,y=-22..25,z=-17..35
+        off x=-49..-32,y=-26..-13,z=19..38
+        on x=-28..25,y=-46..2,z=-11..43
+        off x=-30..-21,y=-44..-26,z=6..21
+        on x=-20..31,y=-39..11,z=-23..28
+        off x=33..49,y=29..47,z=8..25
+        on x=-28..25,y=-26..20,z=-49..-1
+        off x=-19..-5,y=3..18,z=-44..-27
+        on x=-34..15,y=-29..25,z=-34..17
+        on x=-77707..-66888,y=-15495..7977,z=21658..44356
+        on x=16734..33844,y=-90735..-54900,z=2270..19264
+        on x=37676..47017,y=-53726..-31603,z=-58485..-51594
+        on x=-25500..-16563,y=-6468..2463,z=69232..89880
+        on x=-35872..-12957,y=-84461..-60975,z=-20007..-9532
+        on x=-89647..-67921,y=-39059..-13640,z=-42281..-6574
+        on x=47838..82298,y=-43677..-35749,z=9027..31549
+        on x=-9400..11474,y=-39127..-21505,z=57808..89970
+        on x=61666..80803,y=10083..24758,z=37048..46860
+        on x=26068..46741,y=-77898..-58561,z=-30238..62
+        on x=-22689..-13065,y=-81029..-64591,z=-21055..3749
+        on x=38030..60209,y=-34391..-15028,z=-55983..-51628
+        on x=42982..62845,y=-54347..-47689,z=15630..45725
+        on x=-18872..11038,y=-76016..-52462,z=-42387..-37005
+        on x=-55695..-38898,y=36001..55982,z=-70788..-36425
+        on x=-7131..26336,y=42833..63923,z=-64129..-45423
+        on x=-60488..-40325,y=-47405..-31877,z=48181..58567
+        on x=-13302..15801,y=73748..92138,z=-34147..-17494
+        on x=31153..53512,y=41173..61390,z=38591..49656
+        on x=-35709..-8667,y=-34876..536,z=-79524..-59100
+        on x=45731..73067,y=50149..54110,z=-34129..-20399
+        on x=2923..23025,y=53277..82004,z=30350..45240
+        on x=-34895..-14927,y=27451..50766,z=-67502..-59363
+        on x=-8366..10206,y=22907..37139,z=70976..78784
+        on x=26000..31619,y=55905..81695,z=28039..45741
+        on x=-27099..342,y=70224..85805,z=-6497..11011
+        on x=-1601..9361,y=-40465..-9946,z=64120..76194
+        on x=-29110..-17895,y=38967..50663,z=56746..78592
+        on x=-77526..-50930,y=-60463..-42672,z=-16932..667
+        on x=-19801..1121,y=-95369..-68521,z=-2863..7840
+        on x=-56034..-34754,y=-4651..19561,z=61780..87310
+        on x=50357..81377,y=-54480..-35226,z=-13214..22298
+        on x=-37854..-29487,y=-24307..-9466,z=-70318..-65828
+        on x=-87626..-68588,y=-1140..28963,z=23659..43617
+        on x=10140..45670,y=19441..48501,z=52468..67612
+        on x=-61161..-46395,y=50168..60300,z=-43642..-22240
+        on x=-41791..-23146,y=59820..92015,z=-30219..-13117
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