题解 | #查找输入整数二进制中1的个数#

import sys
a = []
for line in sys.stdin:
    a.append(line.strip())
for n in a:
    n = int(n)
    n = bin(n)[2:]
    n = str(n)
    count = 0
    for i in n:
        if int(i) == 1:
            count +=1
    print(count)