#include<stdio.h>
int countdigit(int number);
int main()
{
    int number,result;
    printf("请输入需要统计的数字：");
    scanf("%d",&number);
    result=countdigit(number);
    printf("%d",result);
    return 0;
}

int countdigit(int number)
{
    int number1,digit;
    digit=0;
    while(number!=0){
        number1=number%10;
        number1=number1/2;
        if(number1==0)
        digit++;
        number=number/10;
    }
    return digit;
}