diff --git a/climbing-stairs/mandel-17.py b/climbing-stairs/mandel-17.py
new file mode 100644
index 0000000000..2233946ad2
--- /dev/null
+++ b/climbing-stairs/mandel-17.py
@@ -0,0 +1,14 @@
+import collections
+
+class Solution:
+    num_dict = collections.defaultdict(int)
+
+    def climbStairs(self, n: int) -> int:
+        if n <= 2:
+            return n
+
+        if self.num_dict[n]:
+            return self.num_dict[n]
+        
+        self.num_dict[n] = self.climbStairs(n-1) + self.climbStairs(n-2)
+        return self.num_dict[n]
diff --git a/valid-anagram/mandel-17.py b/valid-anagram/mandel-17.py
new file mode 100644
index 0000000000..2233946ad2
--- /dev/null
+++ b/valid-anagram/mandel-17.py
@@ -0,0 +1,14 @@
+import collections
+
+class Solution:
+    num_dict = collections.defaultdict(int)
+
+    def climbStairs(self, n: int) -> int:
+        if n <= 2:
+            return n
+
+        if self.num_dict[n]:
+            return self.num_dict[n]
+        
+        self.num_dict[n] = self.climbStairs(n-1) + self.climbStairs(n-2)
+        return self.num_dict[n]