diff --git a/src/my_project/interviews/top_150_questions_round_13/climbing_stairs.py b/src/my_project/interviews/top_150_questions_round_13/climbing_stairs.py
new file mode 100644
index 00000000..dc1b1673
--- /dev/null
+++ b/src/my_project/interviews/top_150_questions_round_13/climbing_stairs.py
@@ -0,0 +1,12 @@
+from typing import List, Union, Collection, Mapping, Optional
+from abc import ABC, abstractmethod
+
+class Solution:
+    def climbStairs(self, n: int) -> int:
+
+        a, b = 1, 1
+
+        for i in range(n):
+            a, b = b, a + b 
+
+        return a 
\ No newline at end of file
diff --git a/tests/test_150_questions_round_13/test_climbing_stairs_round_13.py b/tests/test_150_questions_round_13/test_climbing_stairs_round_13.py
new file mode 100644
index 00000000..89e0bdb8
--- /dev/null
+++ b/tests/test_150_questions_round_13/test_climbing_stairs_round_13.py
@@ -0,0 +1,11 @@
+import unittest
+from src.my_project.interviews.top_150_questions_round_13\
+.climbing_stairs import Solution
+
+class ClimbingStairsTestCase(unittest.TestCase):
+
+    def test_climbing_stairs(self):
+        solution = Solution()
+        output = solution.climbStairs(n=3)
+        target = 3
+        self.assertEqual(output, target)
\ No newline at end of file