hammingWeight - AC

Author: jcp0578

leecode/位1的个数/hammingWeight.py

@@ -0,0 +1,31 @@
+#!/usr/bin/python3
+# -*- coding: utf-8 -*-
+'''
+AC 
+'''
+
+#import time
+from math import *
+
+class Solution(object):
+    def hammingWeight(self, n):
+        """
+        :type n: int
+        :rtype: int
+        """
+        return bin(n).count('1')
+
+if __name__ == "__main__":
+
+    #t0 = time.perf_counter()
+    testlist=[0,1,3,128]
+    test=Solution()
+    for i in testlist:
+        print(test.hammingWeight(i))
+
+    #print(time.perf_counter() - t0)
+
+
+'''
+
+'''