diff --git a/.idea/code.iml b/.idea/code.iml
index cf84ae4..1caca5a 100644
--- a/.idea/code.iml
+++ b/.idea/code.iml
@@ -3,6 +3,9 @@
   <component name="NewModuleRootManager">
     <content url="file://$MODULE_DIR$">
       <sourceFolder url="file://$MODULE_DIR$/src" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/lib/src" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/tests" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/src/lib/target" />
       <excludeFolder url="file://$MODULE_DIR$/target" />
     </content>
     <orderEntry type="inheritedJdk" />
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..93a4b1a
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,2 @@
+mod common;
+pub mod solvers;
diff --git a/src/main.rs b/src/main.rs
index 372dde9..db059e1 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,5 +1,4 @@
-mod common;
-mod solvers;
+use advent_of_code_2025::solvers;
 
 fn main() {
     println!("### Advent of Code 2025 ###\n");
diff --git a/src/solvers.rs b/src/solvers.rs
index 40586b1..df406e4 100644
--- a/src/solvers.rs
+++ b/src/solvers.rs
@@ -25,7 +25,8 @@ pub trait Solver {
 
 // The "../../data" and "../../../data" paths are useful for running the binary from
 // "target/release/" directory with "data/" directory in package root or parent directory.
-const DATA_PATHS: &'static [&'static str] = &["./data", "../data", "../../data", "../../../data"];
+pub const DATA_PATHS: &'static [&'static str] =
+    &["./data", "../data", "../../data", "../../../data"];
 
 pub fn run<S: Solver>(solver: S) {
     println!(