水题
#include<cstdio>
#include<cstring>
#include<cmath>
#include<stack>
#include<vector>
#include<string>
#include<iostream>
#include<algorithm>
using namespace std;int x[];int main()
{
int a,b;
int ans=;
x[]=;
x[]=;
x[]=;
x[]=;
x[]=;
x[]=;
x[]=;
x[]=;
x[]=;
x[]=; scanf("%d%d",&a,&b);
for(int i=a;i<=b;i++)
{
int num=i;
while(num)
{
ans=ans+x[num%];
num=num/;
}
}
printf("%d\n",ans);
return ;
}