题解 | #查找输入整数二进制中1的个数#

while True:
    try:
        x = int(input())
        # 转成二进制
        x = bin(x)
        # 去掉前面的0b
        x = x[2:]
        # 用+将字符串连接起来
        x = "+".join(x)
        print(eval(x))
    except:
        break