diff --git a/2024/rust_mem_model/Cargo.lock b/2024/rust_mem_model/Cargo.lock
new file mode 100644
index 00000000..36bf1bf1
--- /dev/null
+++ b/2024/rust_mem_model/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "rust_mem_model"
+version = "0.1.0"
diff --git a/2024/rust_mem_model/Cargo.toml b/2024/rust_mem_model/Cargo.toml
new file mode 100644
index 00000000..8100d28c
--- /dev/null
+++ b/2024/rust_mem_model/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "rust_mem_model"
+version = "0.1.0"
+edition = "2021"
+
+
diff --git a/2024/rust_mem_model/src/step_1.rs b/2024/rust_mem_model/src/step_1.rs
new file mode 100644
index 00000000..a3ee3b4e
--- /dev/null
+++ b/2024/rust_mem_model/src/step_1.rs
@@ -0,0 +1,40 @@
+
+// fn main() {
+//     let s1 = String::from("hello");
+//     let s2 = s1;
+//     println!("{}, world!", s1);
+// }
+
+// fn main() {
+//     let s1 = String::from("hello");
+//     let s2 = &s1;
+//     println!("{}, world!", s2);
+// }
+
+// fn main() {
+//     let mut s1 = String::from("hello");
+//     let s2 = &mut s1;
+//     s2.push_str(", world!");
+//     println!("{}", s1);
+// }
+
+// fn main() {
+//     let mut s1 = String::from("hello");
+//     let s2 = &mut s1;
+//     let s3 = &mut s1;
+//     s2.push_str(", world!");
+//     println!("{}", s1);
+// }
+//
+
+// fn main() {
+//     let s1 = String::from("hello");
+//     let s2 = s1.clone();
+//     println!("{}, world!", s1);
+// }
+
+// fn main() {
+//     let s1 = String::from("hello, world!");
+//     let s2 = &s1[0..5];
+//     println!("{}", s2);
+// }
\ No newline at end of file
diff --git a/2024/rust_mem_model/src/step_2.rs b/2024/rust_mem_model/src/step_2.rs
new file mode 100644
index 00000000..27ca19d0
--- /dev/null
+++ b/2024/rust_mem_model/src/step_2.rs
@@ -0,0 +1,17 @@
+
+// fn main() {
+//     // stack allocation
+//     let x = 5;
+//     let y = x;
+//
+//     println!("x = {}, y = {}", x, y);
+// }
+
+// fn main() {
+//     // heap allocation
+//     let s1 = String::from("hello");
+//     let s2 = s1;
+//
+//     println!("{}, world!", s1);
+// }
+
diff --git a/2024/rust_mem_model/src/step_3.rs b/2024/rust_mem_model/src/step_3.rs
new file mode 100644
index 00000000..27dc8460
--- /dev/null
+++ b/2024/rust_mem_model/src/step_3.rs
@@ -0,0 +1,20 @@
+mod main;
+
+fn same_lifetime<'a>(s: &'a str, start: usize, end: usize) -> &'a str {
+    &s[start..end]
+}
+
+fn equal_lifetimes<'a, 'b: 'a>(x: &'a str, y: &'b str) -> &'a str {
+    if x.len() > y.len() {
+        x
+    } else {
+        y
+    }
+}
+
+fn main() {
+    let s1 = String::from("hello, world!");
+    let s2 = same_lifetime(s1.as_str(), 0, 5);
+    let result = equal_lifetimes(s1.as_str(), s2);
+    println!("The longest string is {}", result);
+}