diff --git a/2024/day9/main.py b/2024/day9/main.py
new file mode 100644
index 0000000..c87b32b
--- /dev/null
+++ b/2024/day9/main.py
@@ -0,0 +1,101 @@
+with open('test.text', 'r') as file:
+    data: str = file.read().strip()
+
+# If block has no ID then it is free
+class FreeBlock:
+    size: int
+
+    def __init__(self, s: int):
+        self.size = s
+
+    def __str__(self) -> str:
+        return '.' * self.size
+
+class FileBlock:
+    size: int
+    id: int
+
+    def __init__(self, size: int, id: int):
+        self.size = size
+        self.id = id
+
+    def __str__(self) -> str:
+        return str(self.id) * self.size
+
+class DiskMap:
+    blocks: list[FreeBlock | FileBlock]
+
+    def __init__(self, s: str):
+        self.blocks = []
+        self.parse(s)
+
+    def parse(self, s: str) -> None:
+        is_file = True
+        id = 0
+        for char in s:
+            b = FreeBlock(int(char))
+            if is_file:
+                b = FileBlock(int(char), id)
+                id += 1
+            is_file = not is_file
+
+            self.blocks.append(b)
+
+    # Returns index of first free block or None
+    def findFreeBlock(self) -> int | None:
+        for i, block in enumerate(self.blocks):
+            if type(block) == FreeBlock:
+                return i
+
+        return None
+
+    # Returns index of last file block
+    def findLastFile(self) -> int | None:
+        for i, block in reversed(list(enumerate(self.blocks))):
+            if type(block) == FileBlock:
+                return i
+
+        return None
+
+    def compact(self) -> None:
+        while True:
+            free_index = self.findFreeBlock()
+            file_index = self.findLastFile()
+
+            if free_index > file_index:
+                break
+
+            free_size: int = self.blocks[free_index].size
+            file_size: int = self.blocks[file_index].size
+            file_id: int = self.blocks[file_index].id
+
+            remaining_file_size = file_size - free_size
+            remaining_free_size = 0
+            if remaining_file_size < 0:
+                remaining_free_size = abs(remaining_file_size)
+                remaining_file_size = 0
+
+            if remaining_free_size != 0:
+                self.blocks[free_index] = FileBlock(free_size - remaining_free_size, file_id)
+                self.blocks[file_id] = FreeBlock(free_size)
+            else:
+                self.blocks[free_index] = FileBlock(free_size, file_id)
+                self.blocks[file_index] = FreeBlock(free_size)
+
+            if remaining_file_size:
+                self.blocks.insert(file_index, FileBlock(remaining_file_size, file_id))
+
+            print(free_index)
+            self.print()
+
+    def print(self) -> None:
+        for block in self.blocks:
+            print(block, end='')
+        print()
+
+# Parse Data
+diskmap = DiskMap(data)
+
+diskmap.print()
+diskmap.compact()
+diskmap.print()
diff --git a/2024/day9/test.text b/2024/day9/test.text
new file mode 100644
index 0000000..bd41cba
--- /dev/null
+++ b/2024/day9/test.text
@@ -0,0 +1 @@
+12345
\ No newline at end of file