题解 | #求int型正整数在内存中存储时1的个数#
求int型正整数在内存中存储时1的个数
http://www.nowcoder.com/practice/440f16e490a0404786865e99c6ad91c9
s = bin(int(input()))
count = 0
for i in range(len(s)):
if s[i] == "1": #切片出来是字符
count += 1
else:continue
print(count)