diff --git a/src/index.js b/src/index.js
index c32abcd3..a251494b 100644
--- a/src/index.js
+++ b/src/index.js
@@ -1,3 +1,3 @@
-module.exports = function reverse(/* n */) {
-  throw new Error('Not implemented');
+module.exports = function reverse(n) {
+  return parseInt(n.toString().split('').reverse().join(''), 10);
 };