diff --git a/december_3_1/.gitignore b/december_3_1/.gitignore
new file mode 100644
index 0000000..ea8c4bf
--- /dev/null
+++ b/december_3_1/.gitignore
@@ -0,0 +1 @@
+/target
diff --git a/december_3_1/Cargo.toml b/december_3_1/Cargo.toml
new file mode 100644
index 0000000..118c196
--- /dev/null
+++ b/december_3_1/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "december_3_1"
+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/december_3_1/src/main.rs b/december_3_1/src/main.rs
new file mode 100644
index 0000000..e7a11a9
--- /dev/null
+++ b/december_3_1/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}