number-of-1-bits solution

Author: yayyz

number-of-1-bits/yayyz.py

@@ -0,0 +1,12 @@
+# bit operation 
+class Solution:
+    def hammingWeight(self, n: int) -> int:
+        count = 0
+        while n:
+            count += n & 1
+            n >>= 1
+        return count 
+    
+# class Solution:
+#     def hammingWeight(self, n: int) -> int:
+#         return bin(n).count('1')