diff --git a/2022/day07-part1/Cargo.toml b/2022/day07-part1/Cargo.toml
new file mode 100644
index 0000000..3e8c958
--- /dev/null
+++ b/2022/day07-part1/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "day07-part1"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/2022/day07-part1/src/main.rs b/2022/day07-part1/src/main.rs
new file mode 100644
index 0000000..0df5291
--- /dev/null
+++ b/2022/day07-part1/src/main.rs
@@ -0,0 +1,65 @@
+use std::{cell::RefCell, rc::Rc};
+
+// Custom data structure
+#[derive(Copy, Clone, Debug)]
+enum NodeType {
+    File,
+    Directory,
+}
+
+use NodeType::*;
+
+struct Node {
+    node_type: NodeType,
+    name: String,
+    size: usize,
+    children: Vec<Rc<RefCell<Node>>>,
+}
+
+impl Node {
+    fn new(node_type: NodeType, name: &str, size: usize) -> Rc<RefCell<Node>> {
+        Rc::new(RefCell::new(Node {
+            node_type,
+            name: String::from(name),
+            size,
+            children: Vec::new(),
+        }))
+    }
+}
+
+fn main() {
+    // Use command line arguments to specify the input filename.
+    let args: Vec<String> = std::env::args().collect();
+    if args.len() < 2 {
+        panic!("Usage: ./main <input-file>\nNo input file provided. Exiting.");
+    }
+
+    // Next, read the contents of the input file into a string for easier processing.
+    let input = std::fs::read_to_string(&args[1]).expect("Error opening file");
+    // Line-by-line processing is easiest.
+    let input = input.lines();
+
+    // --- TASK BEGIN ---
+    let mut result = 0;
+
+    // Set up our filesystem, starting with the root directory as the root node.
+    let root = Node::new(Directory, "/", 0);
+
+    // Also set up a
+    let current = root;
+
+    // Read line by line
+    for line in input {
+        // Split any incoming line by spaces, makes our life easier down the line.
+        let line = line.split(' ').collect::<Vec<_>>();
+
+        // First of all, differentiate between command and list item.
+        if line[0] == "$" {
+
+        } else {
+            println!("item");
+        }
+    }
+
+    println!("Result: {}", result);
+}