杭电2089

#include<iostream>
#include<cstdio>
using namespace std;
const int maxn=1000000+5;
int a[maxn];
int main()
{
    int i,j,n,m,temp,t,x;
    int sum=0,flag=1;
    for(i=1;i<maxn;i++)
    {
        x=i;
        flag=1;
        while(x)
        {
            temp=x%100;
            t=x%10;
            if(temp==62||t==4)
            {
                flag=0;
                break;
            }
            x/=10;
        }
        if(!flag)
            sum++;
            a[i]=sum;
    }
    while(scanf("%d%d",&n,&m)!=EOF&&n!=0||m!=0)
    {
        cout<<m+1-n-(a[m]-a[n-1])<<endl;
    }
    return 0;
}
先暴力打表好！后直接利用