diff --git a/day3/Cargo.lock b/day3/Cargo.lock
new file mode 100644
index 0000000..4104d70
--- /dev/null
+++ b/day3/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "day3"
+version = "0.1.0"
diff --git a/day3/Cargo.toml b/day3/Cargo.toml
new file mode 100644
index 0000000..898e70d
--- /dev/null
+++ b/day3/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "day3"
+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/day3/src/input.txt b/day3/src/input.txt
new file mode 100644
index 0000000..bb85e8f
--- /dev/null
+++ b/day3/src/input.txt
@@ -0,0 +1,300 @@
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diff --git a/day3/src/main.rs b/day3/src/main.rs
new file mode 100644
index 0000000..802bf09
--- /dev/null
+++ b/day3/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    let file_str = include_str!("input.txt");
+}