diff --git a/src/app.js b/src/app.js
index 0d15e7b..51adcc6 100644
--- a/src/app.js
+++ b/src/app.js
@@ -1 +1,56 @@
-// write code here
+'use strict';
+
+/* eslint-disable no-console */
+
+const fs = require('fs');
+const path = require('path');
+
+try {
+  const args = process.argv.slice(2);
+
+  if (args.length !== 2) {
+    throw new Error('Error');
+  }
+
+  const [srcRaw, destRaw] = args;
+
+  const src = path.resolve(srcRaw);
+  const destResolved = path.resolve(destRaw);
+
+  const srcStat = fs.statSync(src);
+
+  if (!srcStat.isFile()) {
+    throw new Error('Error');
+  }
+
+  const endsWithSlash = destRaw.endsWith('/') || destRaw.endsWith('\\');
+  let finalDest = destResolved;
+
+  if (endsWithSlash) {
+    if (
+      !fs.existsSync(destResolved) ||
+      !fs.statSync(destResolved).isDirectory()
+    ) {
+      throw new Error('Error');
+    }
+
+    finalDest = path.join(destResolved, path.basename(src));
+  } else if (
+    fs.existsSync(destResolved) &&
+    fs.statSync(destResolved).isDirectory()
+  ) {
+    finalDest = path.join(destResolved, path.basename(src));
+  } else {
+    const parentDir = path.dirname(destResolved);
+
+    if (!fs.existsSync(parentDir) || !fs.statSync(parentDir).isDirectory()) {
+      throw new Error('Error');
+    }
+  }
+
+  if (finalDest !== src) {
+    fs.renameSync(src, finalDest);
+  }
+} catch (err) {
+  console.error(err);
+}