#include<bits/stdc++.h> using namespace std; //ÅжÏÕâ¸öÊýÊDz»ÊÇÐÒÔËÊý×Ö bool is_lucky(int num){ int a[100000],j=0,m;//ÓÃÀ´´æ´¢¸÷¸öÊýλÊý¾Ý,ÊýµÄÊýλ while(num!=0){ a[j]=num%10; num=num/10; j++; } // cout<<j; for(int i=0;i<=j-1;i++){ if(a[i]>=j){ return false; } m=i; while(m+1!=j){ if(a[i]==a[m+1]){ return false; } m++; } } return true; } int main(){ int a,b,sum_=0; cin>>a>>b; for(int i=a;i<=b;i++){ if(is_lucky(i)){ sum_=sum_+1; } } cout<<sum_; return 0; }