diff --git a/.gitignore b/.gitignore
index c002574..cd48cd9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,5 @@
 build/
 
 .idea/
+
+.cursor
diff --git a/README.md b/README.md
index 48ecbca..35a49c7 100644
--- a/README.md
+++ b/README.md
@@ -38,5 +38,6 @@ Profile on LeetCode: [fartem](https://leetcode.com/fartem/).
 | 111. Minimum Depth of Binary Tree               | [Link](https://leetcode.com/problems/minimum-depth-of-binary-tree/)               | [Link](./lib/easy/111_minimum_depth_of_binary_tree.dart)               |
 | 112. Path Sum                                   | [Link](https://leetcode.com/problems/path-sum/)                                   | [Link](./lib/easy/112_path_sum.dart)                                   |
 | 118. Pascal's Triangle                          | [Link](https://leetcode.com/problems/pascals-triangle/)                           | [Link](./lib/easy/118_pascals_triangle.dart)                           |
+| 500. Keyboard Row                               | [Link](https://leetcode.com/problems/keyboard-row/)                               | [Link](./lib/easy/500_keyboard_row.dart)                               |
 | 3280. Convert Date to Binary                    | [Link](https://leetcode.com/problems/convert-date-to-binary/)                     | [Link](./lib/easy/3280_convert_date_to_binary.dart)                    |
 | 3516. Find Closest Person                       | [Link](https://leetcode.com/problems/find-closest-person/)                        | [Link](./lib/easy/3516_find_closest_person.dart)                       |
diff --git a/lib/common/list_node.dart b/lib/common/list_node.dart
index 97fcdb8..0cccded 100644
--- a/lib/common/list_node.dart
+++ b/lib/common/list_node.dart
@@ -2,5 +2,8 @@ class ListNode {
   int val;
   ListNode? next;
 
-  ListNode([this.val = 0, this.next]);
+  ListNode([
+    this.val = 0,
+    this.next,
+  ]);
 }
diff --git a/lib/common/tree_node.dart b/lib/common/tree_node.dart
index 4b566b2..174466e 100644
--- a/lib/common/tree_node.dart
+++ b/lib/common/tree_node.dart
@@ -3,5 +3,9 @@ class TreeNode {
   TreeNode? left;
   TreeNode? right;
 
-  TreeNode([this.val = 0, this.left, this.right]);
+  TreeNode([
+    this.val = 0,
+    this.left,
+    this.right,
+  ]);
 }
diff --git a/lib/easy/500_keyboard_row.dart b/lib/easy/500_keyboard_row.dart
new file mode 100644
index 0000000..8f5411b
--- /dev/null
+++ b/lib/easy/500_keyboard_row.dart
@@ -0,0 +1,40 @@
+class Solution {
+  List<String> findWords(List<String> words) {
+    const firstRow = {'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p'};
+    const secondRow = {'a', 's', 'd', 'f', 'g', 'h', 'j', 'k', 'l'};
+    const thirdRow = {'z', 'x', 'c', 'v', 'b', 'n', 'm'};
+
+    final result = <String>[];
+
+    for (final word in words) {
+      final chars = word.toLowerCase().split('');
+      var row = -1;
+
+      if (firstRow.contains(chars[0])) {
+        row = 1;
+      } else if (secondRow.contains(chars[0])) {
+        row = 2;
+      } else if (thirdRow.contains(chars[0])) {
+        row = 3;
+      }
+
+      var isValid = true;
+      for (var i = 1; i < chars.length; i++) {
+        final char = chars[i];
+        if ((row == 1 && !firstRow.contains(char)) ||
+            (row == 2 && !secondRow.contains(char)) ||
+            (row == 3 && !thirdRow.contains(char))) {
+          isValid = false;
+
+          break;
+        }
+      }
+
+      if (isValid) {
+        result.add(word);
+      }
+    }
+
+    return result;
+  }
+}
diff --git a/pubspec.yaml b/pubspec.yaml
index aff6720..250ce18 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: leetcode_dart
 description: Some solved problems from https://leetcode.com on Dart
-version: 1.0.3
+version: 1.0.4
 homepage: https://github.com/fartem/leetcode-dart
 
 environment:
diff --git a/test/easy/500_keyboard_row_test.dart b/test/easy/500_keyboard_row_test.dart
new file mode 100644
index 0000000..a2e4fa3
--- /dev/null
+++ b/test/easy/500_keyboard_row_test.dart
@@ -0,0 +1,57 @@
+import 'package:leetcode_dart/easy/500_keyboard_row.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group(
+    'Example tests',
+    () {
+      final solution = Solution();
+
+      test(
+        'test case 1',
+        () => expect(
+          [
+            'Alaska',
+            'Dad',
+          ],
+          solution.findWords(
+            [
+              'Hello',
+              'Alaska',
+              'Dad',
+              'Peace',
+            ],
+          ),
+        ),
+      );
+
+      test(
+        'test case 2',
+        () => expect(
+          [],
+          solution.findWords(
+            [
+              'omk',
+            ],
+          ),
+        ),
+      );
+
+      test(
+        'test case 3',
+        () => expect(
+          [
+            'adsdf',
+            'sfd',
+          ],
+          solution.findWords(
+            [
+              'adsdf',
+              'sfd',
+            ],
+          ),
+        ),
+      );
+    },
+  );
+}