diff --git a/day22.py b/day22.py
new file mode 100644
index 0000000..a085022
--- /dev/null
+++ b/day22.py
@@ -0,0 +1,26 @@
+with open("res/inputs/day22.txt", "r") as f:
+    values = list(map(int, f.read().split("\n")))
+
+calls = 0
+
+def step(a, shift):
+    global calls
+    calls += 1
+    s = (a >> -shift) if shift < 0 else (a << shift)
+    return (s ^ a) & 0xffffff
+
+def rand(value):
+    b = step(value, 6)
+    c = step(b, -5)
+    d = step(c, 11)
+    return d
+
+
+total = 0
+for v in values:
+    for _ in range(2000):
+        v = rand(v)
+    total += v
+
+print(total)
+print(calls)
\ No newline at end of file
diff --git a/progress.png b/progress.png
index 540ecbc..a03f169 100644
Binary files a/progress.png and b/progress.png differ
diff --git a/progress.yaml b/progress.yaml
index ff71352..0ef3bad 100644
--- a/progress.yaml
+++ b/progress.yaml
@@ -39,4 +39,6 @@
 20:
   stars: 1
 21:
-  stars: 0
\ No newline at end of file
+  stars: 0
+22:
+  stars: 1
\ No newline at end of file
diff --git a/res/examples/day22.txt b/res/examples/day22.txt
new file mode 100644
index 0000000..d800886
--- /dev/null
+++ b/res/examples/day22.txt
@@ -0,0 +1 @@
+123
\ No newline at end of file
diff --git a/src/day22/puzzle1.typ b/src/day22/puzzle1.typ
new file mode 100644
index 0000000..3778c72
--- /dev/null
+++ b/src/day22/puzzle1.typ
@@ -0,0 +1,61 @@
+#import "/src/utils.typ": *
+
+#let random(prev) = {
+  let step(a, shift) = {
+    let s = if shift < 0 {
+      a.bit-rshift(-shift)
+    } else {
+      a.bit-lshift(shift)
+    }
+    return s.bit-xor(a).bit-and(0xffffff)
+  }
+  let b = step(prev, 6)
+  let c = step(b, -5)
+  let d = step(c, 11)
+  return d
+}
+
+#let solve(input, steps: 1) = {
+  let values = input.split("\n").map(int)
+  let total = 0
+  for value in values {
+    for _ in range(steps) {
+      value = random(value)
+    }
+    total += value
+  }
+  return total
+}
+
+#let examples = ()
+#let results = (
+  15887950,
+  16495136,
+  527345,
+  704524,
+  1553684,
+  12683156,
+  11100544,
+  12249484,
+  7753432,
+  5908254
+)
+#for (i, res) in results.enumerate() {
+  examples.push((
+    result: res,
+    args: (steps: i + 1)
+  ))
+}
+
+#show-puzzle(
+  22, 1,
+  solve.with(steps: 2000),
+  example: examples,
+  only-example: true
+)
+
+#show-result(18261820068)
+
+//B = ((A << 6) ^ A) & 0xffffff\
+//C = ((B >> 5) ^ B) & 0xffffff\
+//D = ((C << 11) ^ C) & 0xffffff
\ No newline at end of file
diff --git a/src/day22/puzzle2.typ b/src/day22/puzzle2.typ
new file mode 100644
index 0000000..e69de29
diff --git a/src/main.pdf b/src/main.pdf
index 808edb3..b943987 100644
Binary files a/src/main.pdf and b/src/main.pdf differ