题解 | #查找输入整数二进制中1的个数#

while True:
    
    try:
        num=int(input())
        binnum=str(bin(num))
        leng=len(binnum)
        sum=0
        i=0
#print(binnum)
        for i in range(leng-1):
            if binnum[i+1]=='1':
                sum=sum+1
        
        print(sum)
    except:
        break;