diff --git a/userspace/aoc2024/CMakeLists.txt b/userspace/aoc2024/CMakeLists.txt
index 55e7d2c4..f7e0144a 100644
--- a/userspace/aoc2024/CMakeLists.txt
+++ b/userspace/aoc2024/CMakeLists.txt
@@ -20,6 +20,7 @@ set(AOC2024_PROJECTS
 	day19
 	day20
 	day21
+	day22
 	full
 )
 
diff --git a/userspace/aoc2024/day22/CMakeLists.txt b/userspace/aoc2024/day22/CMakeLists.txt
new file mode 100644
index 00000000..6061836e
--- /dev/null
+++ b/userspace/aoc2024/day22/CMakeLists.txt
@@ -0,0 +1,9 @@
+set(SOURCES
+	main.cpp
+)
+
+add_executable(aoc2024_day22 ${SOURCES})
+banan_include_headers(aoc2024_day22 ban)
+banan_link_library(aoc2024_day22 libc)
+
+install(TARGETS aoc2024_day22 OPTIONAL)
diff --git a/userspace/aoc2024/day22/main.cpp b/userspace/aoc2024/day22/main.cpp
new file mode 100644
index 00000000..14dc5be4
--- /dev/null
+++ b/userspace/aoc2024/day22/main.cpp
@@ -0,0 +1,117 @@
+#include <BAN/HashMap.h>
+#include <BAN/HashSet.h>
+#include <BAN/Vector.h>
+
+#include <inttypes.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+using i8  = int8_t;
+using i16 = int16_t;
+using i32 = int32_t;
+using i64 = int64_t;
+using isize = ssize_t;
+
+using u8  = uint8_t;
+using u16 = uint16_t;
+using u32 = uint32_t;
+using u64 = uint64_t;
+using usize = size_t;
+
+static constexpr u64 generate_next_secret(u64 secret)
+{
+	secret = (secret ^ (secret <<  6)) & 0xFFFFFF;
+	secret = (secret ^ (secret >>  5)) & 0xFFFFFF;
+	secret = (secret ^ (secret << 11)) & 0xFFFFFF;
+	return secret;
+}
+
+i64 part1(FILE* fp)
+{
+	u64 result = 0;
+
+	char buffer[128];
+	while (fgets(buffer, sizeof(buffer), fp))
+	{
+		u64 secret = atoll(buffer);
+		for (usize i = 0; i < 2000; i++)
+			secret = generate_next_secret(secret);
+		result += secret;
+	}
+
+	return result;
+}
+
+i64 part2(FILE* fp)
+{
+	union Sequence
+	{
+		u32 raw;
+		i8 diffs[4];
+	};
+
+	BAN::HashMap<u32, u64> sequence_to_bananas;
+
+	char buffer[128];
+	while (fgets(buffer, sizeof(buffer), fp))
+	{
+		BAN::Vector<u8> values;
+		MUST(values.reserve(2001));
+
+		u64 secret = atoll(buffer);
+		MUST(values.push_back(secret % 10));
+		for (usize i = 0; i < 2000; i++)
+		{
+			secret = generate_next_secret(secret);
+			MUST(values.push_back(secret % 10));
+		}
+
+		BAN::HashSet<u32> found_sequences;
+
+		u32 sequence =
+			((u32)(u8)(values[1] - values[0]) <<  8) |
+			((u32)(u8)(values[2] - values[1]) << 16) |
+			((u32)(u8)(values[3] - values[2]) << 24);
+		for (usize i = 4; i < values.size(); i++)
+		{
+			sequence = (sequence >> 8) | ((u32)(u8)(values[i] - values[i - 1]) << 24);
+
+			if (found_sequences.contains(sequence))
+				continue;
+			MUST(found_sequences.insert(sequence));
+
+			auto it = sequence_to_bananas.find(sequence);
+			if (it == sequence_to_bananas.end())
+				it = MUST(sequence_to_bananas.insert(sequence, 0));
+			it->value += values[i];
+		}
+	}
+
+	u64 result = 0;
+	for (auto [_, bananas] : sequence_to_bananas)
+		result = BAN::Math::max(result, bananas);
+	return result;
+}
+
+int main(int argc, char** argv)
+{
+	const char* file_path = "/usr/share/aoc2024/day22_input.txt";
+
+	if (argc >= 2)
+		file_path = argv[1];
+
+	FILE* fp = fopen(file_path, "r");
+	if (fp == nullptr)
+	{
+		perror("fopen");
+		return 1;
+	}
+
+	printf("part1: %" PRId64 "\n", part1(fp));
+
+	fseek(fp, 0, SEEK_SET);
+
+	printf("part2: %" PRId64 "\n", part2(fp));
+
+	fclose(fp);
+}