diff --git a/number-of-1-bits/mrlee7.py b/number-of-1-bits/mrlee7.py
new file mode 100644
index 000000000..6b1b7f37d
--- /dev/null
+++ b/number-of-1-bits/mrlee7.py
@@ -0,0 +1,8 @@
+class Solution:
+    def hammingWeight(self, n: int) -> int:
+        result = 0
+
+        while n > 0:
+            result += n % 2
+            n //= 2
+        return result
diff --git a/valid-palindrome/mrlee7.py b/valid-palindrome/mrlee7.py
new file mode 100644
index 000000000..e4983e01d
--- /dev/null
+++ b/valid-palindrome/mrlee7.py
@@ -0,0 +1,7 @@
+import re
+
+
+class Solution:
+    def isPalindrome(self, s: str) -> bool:
+        result = re.sub(r'[^a-zA-Z0-9]', '', s).lower()
+        return result == result[::-1]