diff --git a/rust/day7/Cargo.lock b/rust/day7/Cargo.lock
new file mode 100644
index 0000000..0f5214e
--- /dev/null
+++ b/rust/day7/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aoc-day7"
+version = "0.1.0"
diff --git a/rust/day7/Cargo.toml b/rust/day7/Cargo.toml
new file mode 100644
index 0000000..60a33b4
--- /dev/null
+++ b/rust/day7/Cargo.toml
@@ -0,0 +1,11 @@
+[package]
+name = "aoc-day7"
+version = "0.1.0"
+edition = "2021"
+authors = ["Yohan Boujon <yoboujon@gmail.com>"]
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+
+[workspace]
diff --git a/rust/day7/src/main.rs b/rust/day7/src/main.rs
new file mode 100644
index 0000000..d0320f3
--- /dev/null
+++ b/rust/day7/src/main.rs
@@ -0,0 +1,99 @@
+use std::borrow::BorrowMut;
+
+#[derive(Clone)]
+pub struct File {
+    size: u64,
+}
+
+impl File {
+    pub fn new(s: u64) -> File {
+        File { size: (s) }
+    }
+
+    pub fn get_size(&self) -> u64 {
+        self.size
+    }
+}
+
+#[derive(Clone)]
+pub struct Directory {
+    name: String,
+    files: Vec<File>,
+    directories: Vec<Directory>,
+    is_empty: bool,
+    parent_dir: String,
+}
+
+impl Directory {
+    pub fn new(n: &str, parent: &str) -> Directory {
+        Directory {
+            name: n.to_string(),
+            files: Vec::new(),
+            directories: Vec::new(),
+            is_empty: true,
+            parent_dir: parent.to_string(),
+        }
+    }
+
+    pub fn new_file(&mut self, s: u64) {
+        self.is_empty = false;
+        self.files.push(File::new(s));
+    }
+
+    pub fn new_directory(&mut self, n: &str) {
+        self.is_empty = false;
+        self.directories.push(Directory::new(n, &self.name));
+    }
+
+    pub fn get_name(&mut self) -> &str {
+        self.name.as_str()
+    }
+
+    pub fn get_directory(&mut self, n: &str) -> Option<&mut Directory> {
+        self.directories.iter_mut().find(|dir| dir.get_name() == n)
+    }
+
+    pub fn get_parent(&mut self) -> &str {
+        self.parent_dir.as_str()
+    }
+
+    pub fn print(&mut self) {
+        println!("{}", self.name);
+        for f in self.files.iter() {
+            println!("File: {}", f.get_size());
+        }
+        for d in self.directories.iter() {
+            d.printlevel(1);
+        }
+    }
+
+    fn printlevel(&self, level: u64) {
+        let mut space = String::new();
+        for _i in 0..level {
+            space.push('\t');
+        }
+        println!("{}{}", space.clone().pop().unwrap(), self.name);
+        for f in self.files.iter() {
+            println!("{}->File: {}", space, f.get_size());
+        }
+        for d in self.directories.iter() {
+            d.printlevel(level + 1);
+        }
+    }
+}
+
+fn main() {
+    // Root directory doesn't need a parent
+    let mut root = Directory::new("/", "/");
+    root.new_file(146);
+    root.new_directory("toto");
+    root.new_file(14323);
+    let toto = root.get_directory("toto").unwrap();
+    toto.new_file(5472);
+    toto.new_directory("tata");
+    let tata = toto.get_directory("tata").unwrap();
+    tata.new_file(77557);
+    let root_name = root.get_name();
+    toto.new_file(2426);
+    println!("Toto Parent: {}",root.get_parent());
+}