#include<stdio.h>
/*int a[1000000]={0};*/
int main()
{
    int a[1000000]={0};
    int i,k;
    for(i=1;i<=1000000;i++)/*把车牌号为4或62连接到了不能要，技术一共的种类*/
    {
        k=0;
        int t=i;
        while(t)
        {
            if(t%10==4||t%100==62)
            {
                k=1;
                break;
            }
            t=t/10;
        }
        if(k==0)
        {
            a[i]=1;
        }
    }
    int n,m;
    while(scanf("%d%d",&n,&m),n+m)
    {
        int count=0;
        for(i=n;i<=m;i++)
        {
            if(a[i]==1)
            {
                count++;
            }
        }
        printf("%d",count);
    }
    return 0;
}

我用的Dev-c++