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'''

File: sfo_15_number_of_1_bits_s1.py

Created Time: 2021-12-09

Author: Krahets (krahets@163.com)

'''

from include import *

# ===== Solution Code =====

class Solution:

def hammingWeight(self, n: int) -> int:

res = 0

while n:

res += n & 1

n >>= 1

return res

# ======= Test Case =======

n = 11

# ====== Driver Code ======

slt = Solution()

res = slt.hammingWeight(n)

print(res)